Altering inquiry information

I have sent an email to customer services on the 17th August asking to contact me due to MTN that has charged my double for a monthly occurring data bundle. <br> I have not had any phone call on the phone number that i have provided. I then rep**** on an email from them which was generated by their server with *** on the 22nd August.<br> <br> I have received an email today from them with the person handling it by the name of Matshidiso Moloi. The mail reads that they are requesting either the MTN number in question or the contract number. However it is clearly stated in both emails that i have sent on the 17th and the 22nd August. <br> The number was removed from MTN services, and they now claim that i didn't supply the information.