What a misleading advert-Vodacom is a lier

When go into online to get a contract. You get and advert that says Samsung A10 on uchoose flexi 175 for R175 per month and it state on a buttom part of the form that you will also get a samsung A10 blue but when you contact the centre to take up a deal you get told there is no such deal. You only get one phone. I was told it is because i selected a black one that is why it is saying such, however, i went back and tested if it was the case only to find that it was not the case. It was all a lie.