Dissapointed and Angry

Hi recently went to Telkom mobile in gateway to obtain a contract for the Samsung Galaxy S6 , it is my wfes birthday and i got this phone as a gift for her, i was approved for the contract and was told they are out of stock and they should get the phone next wednesday , when i went there , they still did not received stock , upon much argument they tried to get one from ther branch in Balito which they said will be there on saturday , on saturday when i get there ,they say they dont have the phone , my think is why are you advertising for something you dont have, all ther other network operators have the phone , is there no supply and demand on this phone and why is your suppliers taking forever, also the S6 come in Gold , white , Black and Blue but this store says they only have black and white , why is that ? when the phone came out ,it was advertised with all the different colours ? , i even told the consultant that i was going to cancel the contract and he tells me i cant do that , but you guys can take forever with the product , dont advertise something you dont have in store , its false adverting , i need this phone as a matter of urgency , also i would like a Gold.