Lack of information/false adverti*****t

I went to Vodacom Atteridgeville,25 March 2018 to upgrade my contract. Stella assistant me and I was told they dnt have stock they will call me when they receive stock,on the 27th I received a call telling they got stock I went to collect on the 29th only to be told they made a mistake it’s was not my device that they received no apology what so ever. On the 3rd April I received a call again telling they now have my device, I went on the 6th to collect it the contract was for 10gig for R229 . Then on 10th April received a call from a different sale person telling me the contract I took it’s suppose to be R299 because when I signed the contract on April and the R229 was a March special and I was told to return the device if am not willing to pay the new price. The information was not communicated to be when I went signed. What happen to consumers right, Vodacom stuff need to be taken to training.