Unlimited WiFi equals no WiFi

Hi I am most dissatisfied with Telkom's lack of service lately. We pay for a landline and unlimited wifi which has now been down since Monday. Last week it was down for three days, the week before last it was down too, not to mention the week before that. After numerous calls to their call centre we are told every time that it's an area problem or ****** cables. I've mailed them directly on Twitter and got a response asking for the number of the affected line. I rep**** and am still waiting for any further communication from them. How long could it possibly take every week to fix a problem? We work from home and need the service but it's now costing us a fortune in data every day. We'll Telekom even give us a credit for the fixed amount we pay every month when the service is down for days on end almost every week? What do I do? The call centre won't put us through to anyone in a higher position. Terrible service!