Vodacom contract approved and billed but no delivery

I app**** for a new contract on the 17th December 2017 for the Sony XZ1 and a Ps4. The contract was approved and on the 20th December 2017 I received the PS4 with the simcard but no Sony XZ1 cellphone. I have contacted Vodacom on more than 15 occasions sometimes holding on for more than.30minutes at a time but to date I have still not received my phone. Vodacom admits that it was an error on their part and also.confirm that they have enough stock of the cellphone but cannot figure out how to get the cellphone despatched. I have already received a bill for the cellphone in question however I dont even have the item in my possession. Call centre staff are rude and lack the knowledge and s****s needed. I would prefer to receive delivery of this phone within a reasonable time period bearing in mind that I have already waited for almost a month, failing this I would like to cancel this contract.