Very poor service

My ADSL at home were I work from, and my wife studies from, has been given us trouble on and off (slow to no connectivity) for the last year, My ISP MWeb had me change out routers twice before they insisted it was a line fault from Telkom, After getting Telkom come out (This took five days) they assured me the problem they fixed could not have caused the Internet drop on my line and the fault is with the ISP. So I changed ISP to WebAfrica. My problem remains, and now I again have no internet. I again registered the fault with Telkom who today said they will endeavor to fix it within 12 days. The last time I was down 5 days after they told me it was going to be 5 days, now I am going to be down 12 days, yet they still charge me for the service. The second problem with them is that I have complained twice now that they are charging me for a 10m line while our whole area only has 4m. They admitted they are making a mistake over the phone, they even gave me a reference number that were supposedly going to fix the problem and give me credit, but nothing is happening. I am at wits end, you cannot speak to anyone as they just tell you it will be taken care of, but nothing is happening.