Horrible Service

Went to the store and did an application for a contract 12/10. Was told I will be called and notified of approval and when the stock arrives. Went to the store and informed that the application was approved (13/10). Had to call numerous times as they said stock would arrive by 14/10. Received the phone on 16/10 after calling various times during the week. Got the phone and was told that sim would be active on 17/10. Still not active (19/10). Have been phoning the store, however the line is always \busy"and when it is not"