Two Complaints on payment not reflecting on account

Good day, After 2 complaints that my payment was not reflecting on my account and no Customer Care consultant contacted me. This issue has been ongoing for more than a month. After the first complaint I was phoned by Mr Price indicating that I should send proof of the card payment. After sending the proof of my card payment Mr Price got back to me and noted that I should go to the store with the proof. I don't understand why its my problem to sort this out if the error is on Mr Price's side. Furthermore my credit is still negatively affected which is unacceptable.