No support or resolution to ADSL concerns

After numerous calls, fault logging, problem escalations etc I have had nothing but empty promises and non-commitments. First I was told that they can move me to a less congested exchange, then that the exchange will be upgraded in Feb. (It is now May and still nothing). I pay Telkom every month with good money for bad service. I understand Telkom's \Best effort ADSL service"BUT to pay for 4Mbps and to get 0.7 (not even 25% of the service they promise) is appalling. Latency of >700ms on local lines which should be 1200ms!? They are rolling out 10Mbps"