Bad costumer service

Hi. Made a payment on the 1st December 2025 of R350 for my Sim card contract account and wena i called the next day to make further payments arrangements was told I didn't make any payment, went back to the store that day which is the 2 December was told they can't see any transaction for that payment help me cause the offices are closed...went back friday with my banking statement n the slip still no help then told I will be updated Monday nothing today its the 11 December calling them I'm being put on hold for more then 20 minutes with no help the store doesn't care about they costorms....its like I'm a fool now