Home Services pricing mismatch on monthly internet and TV bill

We shifted to Telus two months ago and were told by the installing technician that our home internet would cost $70/month and that they are offering Telus TV free for one year. Our first bill included $19/month for Telus TV, and $120/month for home internet. We have called 7 times to try to resolve this, only to be told every time that the only agent we can speak to can not resolve this. We have waited for hours several times for a manager to call back, which he has never managed to do within the agreed-upon window. Upon speaking with an agent today we were told that it would cost $840 to cancel our service, or we could have a $15 monthly discount. This is fraudulent and pathetic customer service. We are only asking for Telus to honour what they offered us; if we had known the price we obviously would not have bothered switching telecom providers. If this is not resolved we are looking into taking legal action.