*********** Staff unable to locate my payment.

For the past 2 year I am having endless issues with MTN. I am a loyal client of them for the past 8 years. It came to a point that I started to not renew any contracts with them. My last contract is suspended because MTN failed to change my debit order as requested. I made a payment of the outstanding amount via the MTN app. 2 days later my phone got suspended again. they claim I paid R79 short. I requested them to un-suspend my service so that I can make payment. Month after that phone suspended, phoned customer support. they requested proof of payment., mailed proof of payment to ***. She open my phone for me. Day after it was suspended again. Monday morning responded to her mail and notified her that it is suspended again. Nyaniswa responded good day, I'm sorry I won't be able to assist , you need to call 135. Phoned 135, spoke to Qondelwa. She requested the proof of payment, it was e-mailed to ***. She adviced me that my line will be open in the next 20min. 24hours later and it is still suspended after multiple restarts.