False advertising!!

I upgraded my phone/package at the Vodashop Canal Walk to the Xperia XZ Premium on the 13th April 2018, which came with the added option of a PS4, which i obviously took. I received my phone on the day of upgade, but not the PS4 as they said they didn't have the stock yet and said they were getting it in the following week from their Supplier. It is now a MONTH LATER and still no stock?!? I understand that the problem is the supplier, but i still feel that it is Vodacom's responsibility to sort something out.

I leave for overseas for the next 9 months on the morning of the 15th May 2018. I'm now going to be paying for something for at least 10 months and still not have the product - thats false advertising!! Surely something can be done to help me out here???