Abolutely no service or clue, just excuses

My Line ran between 8.7 and 9MB sync for two years. Since November last year I struggle to get 7MB if I am lucky? I have logged so many calls for this that I have lost count. For 3 months now it goes from 9MB to 7MB to 6MB and then when I log a call I have no dialtone or sync for the rest of the month. I have had 2 solid months of absolutely no service - dead line - refund from Teldom... Not a F*(#K - I am expected to pay the full account. There is a difference between best effort service and F*(&kall effort service. I want an answer today - can you idiots fix this or not? And where is my refund???