What should I do

What should I do? I bought a phone from Incredible Connection. The phone is giving me problems, so I took it back. The technician says there is a virus, and they booked it in. The phone has a factory defect, but they refuse to give me my money back and are forcing me to take another phone, which I don't want. Now I'm stuck with a phone I can't use, just because they won't refund my money. This was on the very same day that I wanted my money back. They say they don't have money and that I must wait until they have money. What can I do to get my money back? RESOLVE THIS MATE TODAY