Messed up my relationship and don't know what to do now.

This is gonna be a long one, buckle up. I am M. Using a throwaway account on purpose because my original has some terrible comments and participation in some distasteful subs. Not an excuse but I was not in a great position for some time and processing "feelings" is not easy.

My parents started looking for an arranged marriage match about 2.5 years back , relationships hadn't worked out and i decided to try out AM. after a few hit and trials, I was introduced to my ex-fiancee by a mutual friend of our parents and we hit it off instantly. Seriously, she seemed perfect- good personality, pretty, good job, plus she wasn't annoying (it was a running joke between us that we didn't find each other annoying) . She was apprehensive about marriage and wanted to spend about one year getting to know each other before we started with actual wedding prep. Family was also fine apart from her elder sister who seemed standoffish but otherwise didn't bother us.

Now to her credit, she was honest about her family history from the second meeting itself- elder sister was divorced, case involved 498 and dv litigations etc. But the cases went on for so long (about 5 years) damaging their reputation in society and draining money, they just decided to withdraw and mutually end it. I was apprehensive obviously for my own sake but the family and the girl seemed great so I went ahead. Her ex BIL works in the same organisation as mine, same dept but different locations, so I didn't know him personally but it wasn't difficult to find out about him . Most people gave indifferent opinions - he's a di#k in general but doesn't seem like an abuser, plus he was happily married to another lady. And ex fiance's sister has a slight reputation of being too much of a feminist and slightly adventurous, so this added to my doubts. Yet, I stuck on and we dated for about 8.5 months because my relationship with my fiance was just fantastic and she seemed so honest about her interpretation of the events, i wanted to shorten the courtship period and just marry her already.

However, one of my friends was in same location (job) as the ex bil and let the information about my relationship slip to him. The ex - bil got in touch with me, spoke to me for a long time and i entertained him. He sent me a video of the sister yelling at him and some angry abusive messages sent by her to him when they were married. Honestly, the doubts were piling up anyway, especially because of her elder sister's rebellious nature and this proof sent me over the edge.

I met my ex, pretty much yelled at her , called her family a bunch of sh#t and decided to break off the relationship (my father and sister were not sure but my mother was on my side). She tried to explain, told me that her ex bil would abuse and also slap her sister all the time but the minute she tried to retaliate, his family would start recording and make her look bad. I wasn't falling for that and called her some pretty sh#tty things that I won't be typing here because now, i embarrassed that i said all that. She didn't really fight for me either after a point, just told me to "fu#k off " and never contact her again. It's been 10 months and i haven't met any AM matches that I have gelled with because I loved my ex and it's been an embarrassing negative, bitter spiral.

Two weeks back, the ex-bil's second wife filed a case against him and this time, there is no doubt who is at fault. My friend informed me of it.

I feel terrible and disgusted- of the person I have been these past months, the way I treated her and the things I said about her family. I tried to message her but she has blocked me off all her social media, whatsapp, instagram, even her reddit account is deleted. I contacted her best friend on Instagram but she angrily told me to leave her friend alone and blocked me. I want her back, I'm trying to become a better person again, for her sake I'll do it but I'm fu#king scared she won't give me the time of day. Should I call or message her father? Her parents liked me a lot, maybe I could visit them at their home during her working hours? Need advice on how to proceed.

Tl;dr: broke off my engagement and behaved despicably with my ex fiance due to misunderstandings. I want her back.

Edit: I was hoping to post this in askindian men too because I participate there through my main, but this account doesn't have enough karma, so if someone can post on my behalf, help a brother out.