NO REFUND FOR FAULTY GOODS

Bought faulty usb modem on 30/08/15. Returned to store. Don't want to refund me my money. Time money petrol frustration in trying to get it working. Missed my work deadline. Blame my equipment. Working fine. Spent almost 2 hours in store for own technician to try get working. Carrying on for week and a half already. Customer care removes my escalation and tell me they tried to get hold of me and then removed my escalation. I still don't have my money back. Gave faulty modem back to assistant manager. Actual branch manager never there. Really don't know what to do if customer care cant help you. No complaints site or link. Drop down list no complaints.