Cell Ce cant sort out free minutes problems

Sept 15, I was not able to receive calls. It took CellC more than a month to resolve. Once it was resolved I realized my free minutes are disappearing without making calls. I've reported it. CellC representative promised to revert back, but without any action. Sunday 1 Nov when the new minutes became available, I've started monitoring the free minutes. Monday the 2nd, I've phoned Customer Centre, and they indicated \yes we can see no calls were made on your account