Vodacom failed again !!!

I did an upgrade online and for the second time the after sales service is shocking. I did the upgrade about 3 weeks ago. An agent phoned to confirm a week or so later and to date I have not received anything as yet. When I called in I am told that is has been sent back as the address was incorrect but I did not receive a call for delivery or confirmation of details. Just to add that the upgrade is a data contract and am being told that I was called on this line but being data line in a tablet not sure how they are going to get hold of me. When confirmation was done my normal cellphone number was used. The last time I tried to do this there was also a problem so it seems the online route is a major problem and Vodacom unable to attend to proper service. It seems the time has come to cancel this contract and move to a more professional and trust worthy provider and Vodacom has failed me not once but twice now.