Credit Request Refused - For MTN's Error!

After I returned from an overseas trip, my 1 sim card,(so I thought), got suspended pending an investigation as my bill run up to a whopping R1.2MILLION in 5 days. Instead my full MTN account got suspended.After almost 4 months,only the particular sim that was under investigation got unblocked,the other never got re-activated again and 'till this day,a year later I have continued to pay R309 per month. I finally discovered this on 8 Feb.When queried,I get told by the lady in the call center( 1 of the 7 people I spoke to, and 5 departments later) that I cannot get a credit for all those months I have been paying as it is almost a year ago. Beware of MTN *****ing you money, and don't dare request a credit for their mistake, the answer is NO!