No internet for over a week and keep escalating fault and getting no response

We have Telkom ADSL that at the best of time is very slow but now has completely stopped working 3 times in the last 2 months. We keep logging faults which is an easy process but the response time to servicing the faults has been appalling despite my calling twice in a week to escalate the fault. My husband has work to do from home and has had to use my vodacom data which has cost me 5GB of data in the last week (5GB normally last the whole month).