No refund received till todate

I ordered a top and received on the 28/11/17. Requested a return on the same day as the top did not fit. SPree sent the qourier 2 days later and I later received an email on the 5th of Dec to say they have received item and the refund will be processed in 7-10 working days. That has lapsed on the 22nd of December, still no refund. All my attempts to call have failed as no one ever answers until my airtime is finished and tried emailing- only received an automated reply to say an agent will get back to me. Till today. I’ve heard nothing from them. I’m highly disappointed at the service I receive. All I want now is my money and not to ever deal with such incompetency.