Memory Card

I bought a 16GB memory card worth 150.00 From an indian shop in the mall Seeing that they are in the mall and it's probably a store that may be ideal as well to try out I went and purchased the card a week later I go back to my respective location where I currently live and all of a sudden the card wont work and is written in chinese forcing my phone to a complete shut down when I do check the legitimacy of the card it show none whatsoever of legitimate information and is in fact written in false english I then went back to the store and the manager fought with me verbally and told me to get out of his shop because he claims he told me to come back within a week so I further asked for a new memory card and he refused and made me feel puny as a customer who was somewhat feeling ****med of his money