Funds not reflecting on MTN

I have a contract with MTN and I made a payment on 1 June 2020 using MTN App. I keep on getting messages from MTN saying they haven't received my payment and my account will be suspended if I don't make a payment.

The first time my account was suspended I went to the branch in Boulder's mall in Midrand. I was told that my line has been restored and I have to call 135. I called 135 but my call was not picked up. I got blocked again to making calls and I had to call 135 again. I spoke to Nonduduzo and she told me that she can see the payment I made but it's not updated on the system. I asked her is there anything she will need from me? Maybe the reference number or something? She said no she will log a query with the banking department. My line got suspended again and I called 135 again and spoke to Agnes, I explained to her what's going on, she asked me to email her my bank statement showing that money came out of my account, I did so. She said I must wait for 24 hours. Yesterday 07/06/2020 I received an sms again saying the same thing that I will be suspended if I don't make a payment. I called 135 again and spoke to some lady (I forgot her name) and she told me that I have to wait about 3 days and I asked what will happen to my line while I am waiting? She told me that she won't promise that I won't f get suspended from making and receiving calls. Today 18/06/2020 around 10:00 I received the same SMS again telling me the same ****. I called that useless call center of theirs and they are telling me to call after 2 hours they are offline.