INCONSISTANCY

I had a debt owing to Bonitas in November 2017, in the amount of R1430.86, for account number at Bonitas ***. On the 3rd of November I paid DIRECTLY to Bonitas half of that amount which is R715.43. The balance of R714.43 was paid to the bank account of Creditworx in February 2018. Creditworx has since then been insisting that I still pay the amount of R714.43 to them that I HAD PAID ALREADY TO BONITAS. It is now 2 years later after how many proof of payments that I have been sending to the Creditworx, to different members of staff, and they still insist that I must proof that this amount was paid to Bonitas. I have sent them a statement received from Bonitas showing a zero balance, and yet Creditworx still sends on a continuous basis a sms informing me to pay the amount owing. My question is, are the staff properly trained at Creditworx??? or is Creditworx more worried about their budgets and collection of monies that is not owed?? Do they not know how to reverse a journal in their accounting books. Seriously how can I pay more money for something that was fully paid to them and their Client. Somewhere along the line there is no communication between Bonitas and Creditworx and this is not my problem. I would love to take this to court with my proof of payments made and would love to see how from owing R1430.86 has increased to 2146.29, after this was all settled in February 2018