AWAITING CREDIT FROM *****LENT SIM USAGE

I have been a loyal corporate MTN subscriber since 2006, where my account was held at Nashua Mobile, until November 2014 when I received the most ********** and disappointing client experience during the migration to MTN (Nashua Mobile closed doors). During this period ********** usage was made on my sim card and when numerous calls were made to the call centre (808/809) on why my phone bill was so high they said nothing could be done until I receive my statement. So in effect, despite me reporting a potential issue with my high phone call usage to the call centre they said they could do nothing till I receive my itemised billing which only occured 3-weeks later - so during this period someone had free usage to my sim at my expense despite me reporting it earlier on.I am still waiting final feedback and confirmation as to the way forward regarding these calls as well as the necessary credits to be passed.I've received numerous reference numbers but no-one is following up with me on next steps.<br> <br> If this is the future service to be received then I am seriously considering moving over to another mobile network.<br> I require urgent assistance from someone senior at the Retention Centre