Allow me to upgrade my DSL line

Since December I have logged 2 requests to upgrade my DSL line from 2Mbps to 4Mbps.<br> *** and ***A<br> <br> The Sales department claims that both orders have been completed, while the Technical department are unaware that these orders have ever been placed. As a result, they are unable to flip the switch on the exchange to allow the 4Mbps line speed and sales are about to start billing me for the upgrade. <br> <br> I have now contacted Telkom so many times I've lost count. Sales sends me to Technical, Technical sends me back to Sales etc. etc. etc.<br> <br> Can someone please help fix this issue?