Account Payment vanished into thin air from an entity that was collecting on behalf of Edgars

Good day all, I have a huge issue with the Edcon/Edgars/RCS group that I need to address, and hope others will follow suit because it appears that Edgars is now in the business of ******** people, my account fell in arrears sometime in 2020 during the covid19 lock-down period, I received calls from debt collectors ( Brooks & lyt / CSS solution ) on behalf of Edgars and made an arrangement for an amount to R400 from the R886.95 outstanding balance that was outstanding, therefore a day later I proceeded as advised and a minimum of amount R400 was paid on the 14 Jan 2021 and proof of payment was submitted to the debt collector via email & WhatsApp of which the receipt acknowledged, now after I visited the store : South-gate branch to try to pay the remainder balance expected being the difference from the R400 that was paid and to learn that the overdue balance was still reflecting the same R886.95 and I was advised to wait for at least 7 working days to see if the account will be updated once the money was cleared into the Edgars account up until date my account still reflects with the same balance and nobody can account the payment that was made to the debt collectors on behalf of Edgars, I went to the store and I was advised to contact all the parties involved vvm, rcs group, brooks & lyt/css solutions including edcon but I am currently caught in-between turmoil with nobody taking into account of the payment that was made even after Brooks & lyt acknowledged the payment on behalf Edgars has left me to play detective in tracking the payment although there's concrete proof from my bank on where the money was paid to reflecting the full details of the payment to and from including the amount paid but to date I am being sent from pillar to post, it appears that the money has vanished into thin air, I have tried several channels to communicate with the relevant parties to assist in this matter but as usual i receive no feedback nor response on this matter, I am really tired and irate on this matter and all I need is a way forward so that I can pay the remainder balance and close the account, I can be contacted on ***