The same thing has happened to me to. I owe £20k. But never agreed to my credit limit being increased and staff purchasing without my authority. It wasn’t even pointed out I was signing a PA. I stupidly thought I was signing on behalf of my Ltd company. They are threatening personal bankruptcy. Even though I have 0 equity in my house. They are bullies. They had me tears on the phone. They are rude, aggressive, threatening and do not support small businesses in any way. I spent a fortune with them over the years and they end up treating me like I want to be in this position, it’s my fault. They should not be allowed to conduct a business in this way.