Disgusted by the poor service at Stern Promenade.

I bought a phone on account three months ago at Sterns Promenade. After having the phone for 2 months the phone started giving software problems. I took the phone in to the store and they sent it for repairs. How can a phone that is 2 months old be sent for repairs. This would automatically render the phone as second-hand. Furthermore, the store assistant made me buy a memory card (because it would supposedly solve the problem) and after that never worked the manager had the audacity to tell me that "you bought a cheap phone, what did you expect". I am disgusted by the service. If I don't get a response within a week, I would have to resolve this matter alternatively.