HOMECHOICE's pathetic customer service

I bought a Kingsize bedding set 5 months ago and immediately after I bought it I realised it did not cover the sides of the bed. The sheets fitted (so kingsize was correct for my bed) but the duvet did not cover properly. I sent them pictures and a detailed complaint to which they responded that they were escalating. This was 5 months ago. Still nothing, despite the fact that I email them every month asking for feedback. They are happily taking my money every month for a product that is useless. If they are at fault, they should pay for a courier to fetch it and refund me. I called the call centre and they told me I must return it at my cost. I will NEVER buy from them again and I am telling everyone about my negative experience. USELESS