I’m so sorry, I hope you are safe tonight 
I hope someone involved in this awful mess takes some responsibility and moves heaven and earth to rectify the situation.
You must be so scared by this, it must have brought back a lot of strong feelings... so completely unnecessary, ffs.
I still have a joint account open with my ‘estranged’ husband. I’m too scared to try and close it, and my H wasn’t as violent as yours by the sound of things at all. Not quite so determined, anyway, after I went dark...
HSBC refuses to let me close the account, or freeze it or take my name off it or put any limits on facilities such as overdrafts, as they wanted his permission. Although I had told them that I was not in contact with him due to his abuse, and that he didn’t know where me & DS were because I had escaped from him. But no, he had to be on the same phone call or nothing doing, computer says no. Or we can go to the bank in person... together.
I explained why that wasn’t possible and they didn’t give a shit. Not their problem.
The abuse included financial, this was in the middle of trying to deal with the 25k of unsecured debt he had left me with, a lot of which was with hsbc... which took me years to pay back with a debt charity intervening etc.
So in the end I had to leave the joint account... and they gave him an unsolicited overdraft on this joint account in spite of everything. And let him run up £600 more debt in my name. Fuckers.
Found out recently that HSBC also keep refusing to believe my address has changed for credit rating info purposes as well. In spite of all other info to the contrary, they’ve got me down as living in my old address with my husband and still active on that sodding joint account, which I don’t even have a card for or internet banking details for.
I’ve tried to change my details and although I have 5 other ‘new’ accounts with healthy finances, pay council tax & utilities on another property, am on the electoral roll too... nope none of that matters because of sodding HSBC and the account they won’t let me close.
I feel like I’m tied to this man forever, like an unending nightmare. It’s like an unholy triad: I have the physical scars, and the emotional scars, and then of course the financial scars that HSBC have made damned sure I get to suffer.