Ruining small business'

I was asked if I wanted to upgrade from a 10mbsp to a 20mbps account in December. After a lengthy time, my line was eventually connected. The internet speed has been intermittent. Recently it hasn't reached over 10, with constant monitoring. I reported this today, and was told that there is a problem but that it needed to be reported to the testing center. what I wasn't told, was that it is a minimum of 4 days, with no internet, whilst they test the line. Telkom, this is a business line, and i cannot go without internet for more than 1 day. So I phoned back to find out where the internet had gone, and was then told about the 4 days. So I have had to withdraw my complaint, which may now take a few more hours. More importantly I am being charged for a 20mbps line, and I cant even report that I am not getting it, without them taking my internet away altogether. This is very very damaging to a small business. Help!!!