Consultants not doing what they get paid for

I took out a top up contract at the Woodmead MTN Store on 25th of May 2015.I noticed every month MTN debited orders were more than what I signed for so I thought I'd leave it but this month went to far. They debited my account in the amount of R1121.00 so I decided to go to the woodmead store where this consultant just stared at me and dialed the customer care service on my phone and said I should phone them, which I did but the lady at the customer care service was just as useless. So I decided to return to the MTN store the following day and Luvo Booi assisted me didn't seem like he wanted to at first but after I raised my voice and showed him my copy of my contract he then assisted and phoned the customer care service he spoke to a gentleman who told Luvo to send a request for them to refund me for every month i was being billed for when it clearly states on my contract that i requested a topup contract. The consultant apparently never set it up.When i took out the contract , it was during MTN strike. They are quick enough to go on strike for more increases but they ***** from customers? I'm now waiting... I've been a loyal MTN customer for years and must say I'm disgusted.