Unacceptable

Hi There, I got an adsl line installed on Friday the 16th of October. The guy who installed it was prompt and seemed he knew what he was doing. On Wednesday the 21st of October I decided to use mweb as my isp and just rent the 2 meg line from Telkom. When I app**** the user name and password mweb gave me my Internet instantly worked very well. After just 15 minutes it bombs out and I could no longer use the Internet. I called telkom and they said it was a fault from their side and that they would sort it out. My reference number was 624crk211015. This morning I recieved an sms saying it has been resolved but it hasn't! So I call back and the consultant said that it is not syncing again, he advised me to get a new modem as it could be the modem I am using so I did. Guess what it's NOT the modem. This reference number is 97crk261015. What upsets me is I have just had it installed and will get billed at the end of the month for Internet that does not even work, also I will get charged for installation when it only worked 15 minutes. I don't know what else to do hear as it feels like il be paying for a service I don't even have! Please please fix this ASAP telkom. Please!