Telkom Poor service

I am an existing telkom WIFI user. One day i was suddenly informed that my line has been cancelled, which i had no idea about at all. I then had to go through tons of missions to get the line active again, with which i was then invoiced for a cancellation fee as well as a subscription fee again. I was in talks with a lady at accounts to sort it out. she said she will sort out the credits etc on the account and i was advised to not pay for anything. The lady has since moved jobs and left us stranded. This all happened a few months ago. Recently ive tried applying for a cell hone contract and i was declined because i apparently owe Telkom around R4500?? I am now also in debt review because of your guys mistakes and has caused me majir inconvenience... I need to get this matter resolved and my name cleared ASAP!! Thanks