NON-Supply of adsl line data

I have a 6-month contract at Mweb, supplying data and the adsl line. The download speed average around .10kb - that is ---- POINT 10! We have logged hundreds of calls since this (non)service started, and everyday it is the same. We are bounced between Mweb and Telkom (another NON-service company) and it seems both of them are INCAPABLE of fixing the problem. Last week I emailed their 3 different sections: billing, customer and technical services, asking to escalate my problem to a senior manager. This simply did not happen - this query does not get past a call centre agent. This rates as THE most pathetic service I have encountered in a long time!