Wrong provisioning

I have two contracts with Mtn,one is a deal of 80GB per month and the second one is 8Gb per month. The problem is with their provision. They give 10 GB for 80GB and they also give 2Gb for 8GB. I went to mall @ carnival to request a contract for the one of 2GB but months passed no response and the consultant I spoke to said the guy whom I took the contract from left so he cant help me, the 80GB I sent it through to MTN via the email given my the consult i spoke to on the phone, and also logged a compalin via mtn complaints and no response by MTN still.