SHOCKING SERVICE!!! CNA.... LA LUCIA MALL

Shocking service received from CNA La Lucia Mall. My mom, bought an external hard drive from them, only to find out that the hard drive is actually faulty. :( After taking it back to them (hoping for an exchange), I was told that it had to be evaluated. It has now been 2 weeks and to date, i have not heard back from anyone giving me feedback after taking the drive for evaluation. All he needed to do was plug the hard drive into a computer at the same time and check for himself that the drive is not communicating there and then. How difficult can that be! Surely with a proof of purchase and having paid for the item, they should exchange it without questions asked. Not happy customer at all!!!!