Line upgraded without approval

<p>a call center agent called me request the adsl line ********** 259 to be upgraded to 4mbp/s. i said instead of upgrading i would opt for another line added in Centurion. She then phoned me and said it is not possible. i then said i will not upgrade. another agent called me offering an upgrade i declined. i then got an sms saying your order has been processed successfully. i phoned the call centre informing them i didnot request for an upgrade. they said they would rectify this error. i know received a statement with subscription services for 4Mbps(20GB 20GB)with a bill of 1184, which i didnot order. i am extremely dissapointed.</p>