Mtn - Extreme service failure

I have been a loyal MTN customer for many years and I am very unhappy with my most recent experience regarding the renewal of my contract. The 30gigs that was supposed to be valid for 30 days expired/revoked prior to the expiry date (the new contract was activated on the 13 dec 2017and the 30gig data expired on the 28th dec 2017) on the 28th Dec 2017 I called the MTN customer care line was told that the balance of the data would be accessible to me. However, when this did not happen I phoned again and was told that they did not have any information on record regarding my query. subsequently every time they could not give me any information, I was told my query would be escalated to the manager. The reference numbers given to me 1- ********** 4717 and 1- ********** 5216 even today when I phoned they had no information on the system. I would appreciate if Mtn can resolve this matter and advise on the way forward by close of business Friday 12th January 2018.