Coverage call logged over 1 year ago, no response

On 2nd August 2014 I took out a 5gb data contract. On 8th August I tried to cancel it but had to log a coverage call ***. In November 2014 I moved and had to log a new call ***. Despite frequent calls and promises from the call center I am still waiting for Andries to call me. Some days I have 3G coverage then some days all I get is 2G EDGE. I do wonder about the voicemails I am getting on my ****le despite my emphasis that they must use my cell. Today is one of those good days.