Suspending my account when payment was made!!

We have MTN customers for over 15 years and have always paid our accounts.

We made payment on our account at MTN store in Dainfern Square on the 9th December 2019 as per payment reference number PMT***, was given proof of payment and all and on top of that, we received a screen shot from an MTN consultant that the payment had reflected accordingly.

Now all fo a sudeen we are eing advised that this payment was not made. How do I get receipt/ payment print out if no payment was made?? Our phones keep getting suspended because of the payment not reflecting on their system. On the proof of payment - it reflects that the sales consultant Dineo Maki Mahloa is the one who processed the payment that day and who assisted us. We have been sent from pillar to post and the call centre consultants are also just useless. It is not my problem that someone is ********** and I have the proof that payment was made. STOP SUSPENDING THE ACCOUNT WHEN PAYMENT WAS MADE!!