DISSAPOINTED CLIENT

I purchased goods to the amount of R371,71 on 6 Nov 2020. I paid R300,00 on 27 November 2020. On 17 Dec 2020, I called the accounts dept to find out what’s my outstanding balance and I was told its R142 plus a few cents. On 17th Dec I paid R143,00. On the 26 Dec 2020, I received an sms stating I have R1500,00 credit available which meant that I was not owing anything on this account. However, 11 Feb 2021, I receive an sms stating I’m in arrears of R77,00. I called Game and spoke to Tyrick who informed me that its interest (how can interest be charged when my account has been settled on the 17th), plus account protection fee and a fee to keep my account active. This is ridiculous, I have this account for years and once I pay the outstanding balance that settles my account in full and no further charges are added onto my account. Why was an sms sent to me on 26 Dec stating I have R1500,00 available, if I had an outstanding balance. Matter of fact a couple years ago I had this same problem when I contacted Game I was told that it was a “system error” and my account was cleared. I do not take this lightly has I have an excellent credit rating and I feel this is day light *******, therefore I will be closing this account.