telkom deleted adsl line without any notification

We have an 4mb uncapped line, got a call from telkom about a promotion to upgrade to a 10mb and dstv explorer upgrade but before confirming the installation of the dstv we requested to cancel the 10mb and stay on the 4mb uncapped line, they cancelled the upgrade and even deleted our account without any notification, call centre 10210 take ages to answer the to be cut and then have to phone back yet again. For a company ruling south africa in communications they have pathetic non excisting customer service.