Worst after sales service

I purchased 3 pairs of sandals from spree online in December. These were promptly delivered a few days later. Although the items (and their boxes) were all marked size 7, one pair fit, one was too small and the other too big. After several attempts at 'phoning them, I emailed them advising of the problem and I received the Ref number on 15 Dec with a note that they were experiencing a high volume of calls / emails and begging for my patience. <br> By 7 January, I figured I had been patient enough and emailed them again, saying that I would appreciate a response, which came through on the same day with the same message as before but a new reference number. Later that day, I got another email from them, stating that my request has been solved and that I had to reply to that email if I wanted to re-open the request, which I did, after another few failed attempts at phoning. I then got the same response from them a day later from Andre. It then became a bit like a tennis match where he asked me to explain the problem, which I did and I then got another email from him asking to explain the problem. My last attempt was on Monday, 11th, and I'm still waiting for them to resolve the problem.