Unecessary Handed oever to legal Collection for paid up account

Good day

I have a problem with Standard Bank, I had a Credit Card with them and on 7 December 2015 I received a discount settlement letter from Standard bank that if I pay the amount of R16178.14 as a discount settlement amount in full that my account will be settle then in full, so on 9 December 2015 I did paid the full amount to Standard Bank and on 15 December 2015 I received a letter from Standard Bank informing me that the account is paid up in full and that the account is now closed.

In June 2017 I received sms from MBD Legal Collections that I must contact them because I have an outstanding amount at Standard Bank for R6302.32 and I have to pay it in 7 days, so I contacted them and explained that I paid everything in full and received the paid up letter from Standard Bank in December 2015, I even sent them the proof of the discount settlement letter for the amount I have to pay Standard Bank as well as the proof of payment and the letter from Standard Bank stated that the account is paid up and closed, so from their on people from MBD offices keep on phoning me sometimes 3 different people from their office on the same day, everytime I explained it to the person and sent all the proof again to them by email as asked, but still the problem is not solved.

So now I have a problem because Standard bank put me on Credit Bureau and I am busy buying a property so now my name is on the credit Bereau and it should not be because my account is paid up in full, I need this problem to be solved and my name been cleared at the credit bureau because it was not right from Standard Bank to put my name onto the credit Bereau or to hand me over to MBD Legal collections because I owe nothing to Standard Bank

Please I am begging and need help with this problem I dont know who else to help me, I even contacted Standard Bank and the promise to solve this problem but nothing happened up to now, and now my bond cant be approved before this matter is solve.

Will appreciate the help and any feed back on this problem, have proof of all the above mentioned letters. even how many times I emailed all the proof the MBD Legal Collections

Thanks Mrs M Leicester ********** 562