Dissatisfaction with Capitec CCS department, I'm crying out to help!! So frustrating!!

For the last 2 months I have reached out to capitec on numerous attempts. Without any success on resolving my case. Capitec provided me a settlement amount which I had to settle in a certain time frame, which I did. They also gave me a 20% discount. The amount due I transferred to my access and credit card. The 20% remained reflecting, I logged an enquiry on the ccs email and without any satisfactory response, they handed me over to vertex debt collector. Eventually they corrected the error and the interest due I had to pay up which I did. No I'm struggling to close both accounts and update my credit status on NCR. I've logged numerous request and provided the proof of payment and even capitec settlement letter. The feedback I get is I need to get in contact with vertex and they again send me back to capitec since they haven't received any payment they cannot give me a paid up letter. I've gone 4 times into the branch without any success. I've logged a case at ccs and they also refer me again to vertex, I believe they do not evens log onto my account to see they have corrected the error. I lost all confidence in capitec and I want my access facility and credit card closed, and credit record updated at the NCR. Thanking you in advance for the support to resolving this matter.