Missing Airtime

Good day<br> <br> On the 11th off every month i get my new minutes on my Contract, On the 12th of December I checked my available airtime witch was R745. on the 14th I checked again and all of a sudden its only R245. After this i called the local MTN in Bethlehem who told me to just leave it cause its going to cost me a R1000 to find out what the problem is, this answer was not good enough. So on the 14/12/2015 I phone the first time. The person answering the phone at MTN call center said she will log my complaint if the money isn't back the next day I must phone again. She gave me a reference number ***. On the 17th the money was still not back so I phoned again. Got a second ref ***. the second time they said they can see the first complain but it takes 3-7 working days to resolve. So on the 22/12/2015 I phoned again. STILL nothing was done. Got another ref number *** Still no progress was made. Almost losing my calm I phoned again on 30/12/2015 Guess what STILL NO PROGRESS. So today 05/01/2016 I phoned again. NOTHING NOTHING. All they can say is sorry I understand your frustration. Well I HAD It with them. Its the WORST service and nobody can give any answers.