Can still not use new phone after a month!!!

App**** for a upgrade and port from Vodacom to CellC on an existing contract. This was 29 or 30 June. We took the special for the Sony Experia Aqua phone. The branch promised us that we can get the phone the Saturday or the Monday after that, which is then early July. Needless to say, no phone, no accountability from the branch staff, blame it all on the supplier. Eventually the phone arrived and we fetched it Saturday 25 July. One should image if would only be a case of inserting the sim and ready to go! NOT!!!! SIM not activated. Went into the branch 2 August, they promised it would be activated the next day. Guess what? NOT!!! Excuses ranged from Vodacom does not want to release the number, to Head Office is offline. What now? How do I get out of this contract? Will you take the phone back?