Disappointed about how unprofessional can finchoice be after trusting them to an extent that I took a loan from them.

I once took a loan with Finchoice which was paid up on the 18 April 2024. They then stopped debiting my account for few months. At around July 2024, they then started debiting my account under the pretence of me having a funeral policy with them. After realising that, I then started reversing their debit orders until they blocked the reversals from around June 2025. I then tried to reach out to them but couldn't succeed as the numbers I had were no longer answered or going through. I tried everything to stop the debit orders but still couldn't manage. It recently during October and November that I started receiving messages from MBD Attorneys that they bought my account from finchoice and that if I pay on time, my account will be up to date. I was surprised to realise how cruel can they be even after receiving my paid up confirmation note. I then reached out to MBD and forwarded a paid up note to them. What then surprised me is that, even after explaining and proving my innocence to MBD Attorneys, they still went on to debit my account on my pay day, which I reversed successfully. What worries me is, it doesn't look like both Finchoice and MBD Attorneys are ready to stop milking me my hard earned money even though I have proven that I'm no more indebted to Finchoice and that all the money debited after paying off the account should be repaid back to me. I really need help.