Way below average service

MTN has the worst customer service 1. It took me a month to try and get MTN to change my contract over to prepaid due to *********** staff and the systems very conveniently always being"down". 2. when I eventually went In store to handle the problem I was told it would take anywhere between 5 -30 days . So I went back to nagging telephonically because it was already the end of my co tract and I did not want to pay for another month . 3. I was told I would not be debited again , alas my account was debited. I reversed the charge and am now getting numerous messages saying I need to pay MTN . ------- but when I try call customer service the lines are always busy and no one can take my call in a timeous manner or without the phone line dropping .