INCREDIBLE CONNECTION Pavilion

Purchased a Mi Box approximately three months ago from Pavilion. Out of the 3 months, we have probably had use of the device for 1 month. The store refuses to refund or exchange the device as they say there is fine print on the receipt (which was not conveyed when purchased) and say that have to do a diagnosis the costs of which I am liable for. The device does not work. Contacted Xiaomi direct and followed their instructions to reset the device, with no luck. Every other retailer would refund / exchange or fix the device at no cost. Why is Incredible Connection special? Very frustrated and disgusted.