Closing off Requests when Fault is NOT Resolved!!

Logged a fault 898CRK250815 & 788CRK010915 I have 4MB DSL line and by 20.00 everyday it drops to 0.10KB I've tested fully and eventually discovered that there is an overload on the exchange in my area I pay R700 each month to Telkom for a line below 1MB I've reported this for the 3rd time and nothing has being done and requests are closed off. I eventually paid Telkom for the call out and yet STILL nothing is done. But let us bounce a payment and our lines are suspended this service is disgusting and unacceptable, call centre agents have a don't care attitude, Telkom feels that they hold the monopoly in ADSL so this is the **** service we receive! I'm planing to cancel and move to IS!!! And they will NEVER transfer you to a dept manager, I wonder why. 500MB download took me 7 hours I kid you not!