NIL loans and bank access

Has anyone applied for a NIL loan before? They’re asking for 90 day’s worth of bank statements. The problem is, I have 2 bank accounts. 1 is what I opened up when my ex and I split, my pension and everything goes into it (opened because I don’t want him knowing how much Centrelink etc I’m getting) But I still use my other account sometimes and it’s attached to my ex’s account and my kids accounts (1 login gives access to all). I haven’t closed that account yet as I still have direct debit’s coming out etc. I don’t want to do the online access for NIL loans because I don’t want them getting access to the other accounts. Just after other options or ways to get around it and I’m desperate. He took the car when we split up now I have no car.