Why do you make it hard???

I closed a business after Covid. It has a business account at standard bank with a small overdraft. I was still paying the overdraft monthly. There were no CIPRO documents because the business had been closed as I tried to explain. The account was closed because of lack of proper documentation, and my visibility revoked. I could no longer pay money into the overdraft. The account was then apparently handed over and I have been contacted by about 3 debt collectors about this account. How do I know which is legit? Modimolle branch has people sitting in rows for agens and they could not assist me. And let's not forget the wonderful people of your head office who on previous occasions 1) kept giving my ex-partner access to my account after the partnership ended and this was communicated to standard bank and 2) had me driving all over Johannesburg because they had incorrect information about which branches had Moneygram. So how do I find out the correct information about paying this account and to who??