Very angry

I’m a foschini customer,on the 24th of May I bought a body slimming liquid tonic at foschini Westgate ,which is the skin nutrition product ,I went to foschini to buy a makeup product but the sales lady from the skin nutrition isle convinced me to buy the product,to which I gave in ,however I did not check the expiry date ,I’m only seeing it today that it’s going to expire in June which is literally 6 days from the day I purchased it,please take this as an official complain because tell me why a consumable product that is about to expire in 6 days is on the isle ,as per the instructions I need to drink just one teas****,we talking about a 250ml bottle,how am I going to finish it in less than a week,please advise on what do I need to do from here onwards ,I’m completely flabbergasted to say the least ,to crown it all I just looked up this product barcode and it doesn’t exist on the website.