Horrible - Hold for over 30-60 minutes for cancellations/retentions

I have been a MTN customer for almost 7 years and the the network is pretty awesome, but here is my concerns. - Renewed my contract in 2017 and was incorrectly loaded by the store and I was charged over R1000 for 3 months - To this date I never received a refund. - I have been wanting to cancel one of my contracts - To get to a service champion, they pick up quickly. I called on the 14th of April for Retentions/Cancellations and I held 60 minutes with no answer. On the 15th I phoned again and held twice for over 30 minutes each with no answer. Is anyone actually interested in helping. My contract expires in September - You will need to let me know if you would like to keep me as a customer as this is horrible.