New Contract open under my name

I have a view contracts at MTN and the past two months all the devices under my name got suspended. When I visit the dealer in Glen Marais, Kempton Park the thirst time the lady could not give me the reason and activate my account. The second time - this was in the beginning of February I was so unhappy that I go to her and asked for expire dates on all of my devices. Then she told me that where is a new number from January opened under my name. this is *****. I already send them my affidavit and certified copy of my ID. and the dealer also faxed it through to MTN. By now I received a invoice for January for this number *** for the amount of R782.38 and for February the amount of R1159.01. Till now nobody came back to me after sending some emails. I am not responsible for this monies due to MTN generated from and by this number, and all funds deducted from me, must be paid back to me