Adsl line for business use very very slow

ADSL line very slow between 08h00 & 17h30. After 18h00 line is smooth and fast. This has been dealt with in the past and an adjustment at the telkom exchange was done. Our business relies on an online server. At the moment we cannot even get to telkom website to report the fault. After 62 minutes today on the phone we were still on hold for fault reporting. After 41 minutes on hold to telkom on Monday 7th Dec, the call was cut off before any details could be given to the telkom operator. We are currently running on Vodacom 3G to keep working but require our adsl speed restored asap.