No Internet for 16 days and counting.

Good day, I have had intermittent internet connection for 16 days now. Some days none whatsoever, I work from home so this is unproductive and costing me potential income. I have called twice, the first time I got a response saying problem resolved, the problem is NOT resolved. I am now awaiitng on second response, I was promised a call on Wednesday nobody called. I am waiting and fedup now.