False advertising and customer disregard.

I pre-ordered a new Samsung Galaxy S6 and was told of the bundle deal that it comes with - ironically being advertised in both TV and Radio mediums. When i collected and re-signed a new contract, i was duly informed that the covers were out of stock and that Clearwater Branch would call me to collect once stock was received. For two weeks, no feedback. I then personally went into the store to enquire about the outstanding cover, i was duly told by the branch manager that the deal no longer applies and was for a limited time only. I can clearly understand this, but I PRE-ORDERED the deal. If I had know i would be subjected to this form of false advertising and empty promises, I would NOT have signed an extension with Vodacom. This is also in complete breach of the CPA and I will be exploring further options available to me should this matter not be resolved satisfactorily and amicably.