What service???

In April I wanted to upgrade my contract. Long story short. I could not upgrade as there was a payment outstanding from a previous contract. On 17 April already I sent the proof of the last 5 payments to MTN. Ref no 218928. Since then I have been trying to get MTN to allocate the payment and advise once done. This query has now been escalated to the Bank payments department and the credit manager 3 times. Ref: 1- ********** 2207, ref: ********** 7, ***. MTN is quick to issue a ref no. Also quick to decline my upgrade. But boy o boy. It is now almost a month since I sent proof of payment. And still not allocated. I cannot believe that you would take so long to allocate a payment and to get a customer to upgrade. At the end of the day. That is how you stay in business. But yet you refuse to allocate my payment, that was made in 2018 already, and keep me as a customer.Your service is just as bad as that of some government departments. No follow up. Not doing your jobs. Wow. Why am I not surprised. But that is ok. I will bid you farewell at the end of August after around 15 years with you. I am sure Vodacom or CellC would be happy to have me.