Paying for services I do not receive

Took out a contract at beginning of the year, but have never had the full benefit thereof. I was advised that our area support 4 meg (not sure how to write this) data line but have never had that speed. <br> Throughout the year I have had scratchy lines, slow speed and intermittent data usage. Have had countless technicians, cable replacement guys and a week ago somebody who came from Atlantis and asking me why he was dispatched. Eventually did a port switch and as with everyone else said: All is sorted. Similarly I receive SMS messages saying problem has been resolved. All the supposed interventions and 'fault fixing' are too numerous to list here. Recently received a call from the testing centre advising me that I should never have been sold a 4meg line because I am too far from the exchange. Was told that they should supply me with wireless and get a rebate for lack of service. Even my additional 3G D-link mobile router (whatever it's called) has not worked for months. <br> Currently I have not had a line for three days (phone dead - again) and I just phoned about progress. Told my issue is high priority but no technician has as yet been assigned. Wow. Meantime I pay monthly. For what?