CREDIT MY ACCOUNT AS PER CONTRACT!

In September I was offered a great deal on my upgrade by Calvin Naidoo and mtn agent who asked me for a contract upgrade of around 60 gigs data and 500 free all network for R169 per month. So I took up this offer and then when it came to me account being credited on the 27th of September portion of the data was credited but none of the 500 mins were credited....I logged various calls with Mtn and spent many hours on the trying to resolve this but to no avail. Spoke to many different agents one of them was Thabiso on ref *** and another was Nomfundo Mkhoba from the customer care division *** who advised that she will look into the matter and request a voice recording of the call between Calvin Naidoo and myself.Its been over a week now since my initial call that I logged and i have had no feedback from Mtn ever since.My colleague was also interested in this offer and when he called Mtn to find out about this offer they mentioned that there is no just offer. My new statement has been issued and instead of R169 I have been billed R578. Calvin added pro rata data and minutes to my contract for the previous month of which I already had sufficient data and minutes to carry me through the month.

Can someone URGENTLY correct this so I can be credited with what is due as per agreement.

Amit Singh