Unresolved monthly contract

cell No. ***<br> I signed up for a new contract/upgrade on 10.9.2015 for my MTN Choice100 at R690.00 This contract included the following:<br> 100 free minutes, 200 free sms and 500 mb.<br> since the renewal date I have never been correctly invoiced. The figures are broken down and are far in excess of the total package.<br> pls pls investigate.and adjust.<br> Best regards<br> Elsbeth P. Barrow