Disappointed customer

I have an active account with telkom which they debit the installments every month however I keep getting sms's saying my account is in arrears and I should make payment and it's been going on for 2 months I then called in stating my problem I was then advised to go with my ID into a telkom store which I did, I went to a telkom store in traderoute mall the lady who assisted me said my account is not in arrears and I should ignore the messages I'm getting. Today I got another sms saying the bureau has a default on my name which obviously is a negative thing on my side, this is very unacceptable!!