Getting charged for calls on MTN Sky

After battling for since 8th July 2015 to migrate to MTN Sky package, it was finally done on 2nd Aug 2015.<br> Now I have migrated to Sky, and I am still charged for calls - R 130.69 since the migration.<br> <br> Phoning the call centre is not only a nightmare to get thru, but nothing gets done.<br> <br> Also, Since I requested a migration on the 8th July, surely MTN has slipped up, and I should not be held responsible for the lack of service and excuses. <br> <br> If the Sky package is unlimited phone calls, smses and 10 Gb data, why am I been charged out-of-bundle rate for calls.<br> <br> <br>