worst service i have ever experienced

I have tried three times to get through to retentions by calling 808, each time i get told they dont get calls the only way i can get hold of them is if they call me. I have requested them to call me 3 times and it never happens. I am so frustrated. I have been with MTN for all my life. I am paying for services which i am not getting. I even got a sms to say i will be contacted and i should use my cell number as ref# but guess what? Never happened. I am sick of this. All i want to do is upgrade a few days earlier as i urgently need a new laptop for business. There is a deal i want in the yellow trader that i would like to upgrade to. I am giving MTN 1 more chance. I am disgusted that i have to complain here everytime. Give me a reason to put a compliment here MAN. This is unreal. Telkom gives me better service. MTN standards have dropped and i dont like it