Standard Bank has terrible customer service

Standard Bank is absolutely terrible with assisting people! I contacted Standard Bank in November 2020 for all outstanding accounts, and I was given the information I requested. I have settled all of my accounts, as per my credit score and requests for settlements, and I was trying to get debt administration off of my name. I was then notified by Debt Busters that there was still a Standard Bank account outstanding. I tried to contact Standard Bank firstly to no avail, then eventually I got through to the contact centre and was told that this loan account had been closed, and I should contact MBD Legal collections. I contacted MBD and they confirmed that they carry no knowledge of this account. After numerous tries of contacting Standard Bank and countless emails requesting further information on this account, I received a very vague and short off email stating that I owe an amount - no Statement, no proof, not even banking details as to where or how to pay. I requested again that proof of this account is to be sent to me, as well as any and all communications relating to this account, as I have had no communication regarding this since 2017, but once again, only part of my request is EVENTUALLY fulfilled. I now have a statement but with no explanation as to why I was never contacted about paying this loan, or why this has not shown up on my credit score, or that it was not mentioned in November when querying my outstanding accounts. and now that I have literally had to beg for information, I find out about this account. As I have mentioned in previous emails, this account does not even reflect on my credit report. Please provide me with the evidence that this account has been communicated to me since the last payment received.