Telkom - ADSL wifi line

We have app**** for our ADSL line to be moved to a new address in December, it never happened, Telkom Springs assists us by cancelling the order for the move and requested a new order, as this apparently would have been quicker. We have been invoiced every single month for a service that we didn’t even had or be able to use. Telkom eventually came to install our ADSL line somewhere in July. We received our first new invoice after the installation on 14 August and we were not invoiced as per the old contract that we had. Telkom Springs advised me that our account with billing amounts will remain the same as it will continue on a month-to-month basis. If we knew all this changes we would have not let Telkom technicians set up the router and ADSL line again. Urgent assistance with rectifying this will be appreciated.