Bad Service - shocked

I order a fridge on the 28 November 2020. the delivery date was suppose to be 08 December2020. I called to follow up on my order and guess what someone picked up. my order was then moved to the 12 December2020. then cancelled I have spent from Monday 7-Monday14 trying to get hold of Mr Shopper. No answer on there phone lines. there live chat not sure if they know they have to reply not just put the computer onto live chat. they say that you can cancel at anytime. but guess what you cant get hold of them. they don't reply to mails. I have gone as far as contacting Pay fast but they need Mr Shopper to give them the authorization to refund me. Pay fast is suppose to protect the consumer as well and make sure that the retail stores are delivering a good service