Can I please have my refund

<p>I purchased 4 dresses early in June 2017, however I didnt like them and requested them to be collected for a refund. The collection was done on 20th June 2017. A refund should have been done within 2 weeks. Still waiting. I sent 2 emails to Spree telling them that the credit card I used for the purchase had been de*****ed and cancelled. I also gave them the new credit card number. I also ticked the box for the "Read Receipt" in my e-mail. All I got back was a message saying my message had been deleted without being read. What must I do to get my R4000.00 odd rand back? </p>