Account query

I have enter into (top up)upgrade for R369.00 which includes 200sms's , 100 anytime minutes, 300mb data I got a bill,<br> I made 2 calls to MTN customer service to try and figure out how MTN got to the total, but no one could answer me. How MTN allocates charges for these 3 items is none of my business, because i entered into a contract for a specific amount of R369 that will not change , unless I buy extra data or airtime which did not happen.<br> my 1st bill looks like this :<br> 2015-08-14 MTNCHOICE100M SUBS FEE R 127.19<br> 2015-08-14 Recurring SMS Bundle 200 R 26.32<br> 2015-08-14 PROMO SERVICE FEE R 196.49...<br> 2015-08-14 SERVICE FEE ITEMISED BILLING R 18.86<br> 2015-08-14 300MB SERVICE FEE R 74.56<br> 2015-08-14 CALL LINE IDENTITY MONTHLY FEE R 7.89<br> Total excluding VAT R 451.31<br> VAT AT 14% R 63.18<br> Total R 514.49<br> <br> I am waiting a response from MTN to explain to me why I am paying more than the agreed amount of R369 <br>