Where is my money?

Bought a dash camera which turned out to be horrible quality and/or faulty.<br> I was told I could send it back for a full refund.<br> <br> It was sent back on 10 June 2015 and now, 12 days later I have still not received my money back after being assured it would take 24/48 hours and that they have indeed received the parcel that was sent back.<br> <br> What is going on?