Bounce back loan taken out by the former business owner that I became the new owner of.

Hi there, I’m sorry to bother you but I’m pretty sure I am being completely taken advantage of. When I took over the company as the sole director from the previous owner. It was agreed that I would also inherit the £10k bounce back loan that the company had already been paid. I have recently opened some letters from the bank that had been deliberately hidden from me and the bank is threatening debt agents to recover the £50k business loan that I have apparently applied for and received!! I am furious and I’m going to phone the bank first thing Monday morning and without giving it away try and ascertain when the loan was applied for and paid out so I can work out if it was done after my acquisition of the company. Please advise on the correct legal term for this type of fraud and the potential sentence for the previous director. I am utterly shocked as the person in question is family and married to my sister. So it will have life changing ramifications for all involved. Please help. Kind regards A very worried and anxious Mr Brown