Shocking service when returning, I.e. once they have their money!

I ordered a single rack dish drainer and got a two tier. When requesting a return I have had nothing but hassles, they don’t reply then they were closed over Christmas now I still get the closure message even though the message states they opened on the 5th of Jan, their after sale service is shocking, I’ve sat with something I don’t want all through Christmas and New Year as they probably don’t want to refund me for it!!!! Won’t be buying from them again that’s for sure!