Poor customer service

I phoned this morning to request a pre-cancellation quote. I'm deaf and struggle over the telephone. I did ask via email last week, but the auto reply said that this type of query can only be done over the telephone. Anyway, the lady who assisted me give me an amount of R719 and said I will be able to see the amount on my profile on the MTN app. Couldn't see anything. I paid via the app with credit card R720. (Ref received from MTN #***) The lady said that I can phone 135 again after payment which I did. Struggle the whole morning to get through. After 2pm I get hrough. Once again a struggle. When I eventually get to the 2nd person, she said I have to phone Monday. This is unacceptable. Really not the first time I struggle with MTN. I just want to do a early cancellation on my contract so that I can get a better data contract with you.

Please assist and also have some mercy with our deaf people. Trust you will assist me urgently.