5 months and still no service from Mtn!

I took out a contract with mtn fir the new S9 and in February my contract expired. I requested to be put on prepaid in March 2020, have called the call centre and send emails numerous times. I have even received smses to inform me that I have been put on prepaid but nothing has been done. It is now August 2020. I have a another contract with mtn and I need to be put on prepaid to port my number! If I knew that the service was this horrible I would have went with Vodacom like my husband suggested. Why can't a simple swap to prepaid be done, I am still on a contract and get billed every month via debit order! Without my consent! I hope mtn resolves this within the week or else I will have to go to the ombudsman for *******ly billing me for these last few months. And the worst part is that I am unable to make or receive calls on my number! Ridiculous! I am an extremely unsatisfied and frustrated client. This is the last time we do business with mtn from a personal and business perspective.