Promised to Phone Back in 2 minutes - You make me Laugh - Shocking Service

I received a phone call from Amanda at ********** who asked me to renew my Existing Contract at R139.00. I have already renewed it at R159.00 per month with no data. I was told that I would get data? How can they phone and now give me a better deal. Needless to say I have not received a phone call back from her supervisor. Once again MTN is shocking to say the least