Poor / No Service

I unfortunately purchased a Philips AirFryer XXL from Mr Shopper website without reading the comments about their poor service / no service. I have tried every means of communicating with Mr Shopper but to no avail. My order has been processing since 25 Nov despite banking with the same bank as Mr Shopper. This is simply a black hole. I have tried their phone number and when I get through, I am no 5 in the queue with a 3 minute wait until "you are number 1 in the queue" and then a dead end - "extension ----- is not available". Mr Shopper either refund me my money paid in good faith or deliver a brand new (in the box with no tampering) Philips AirFryer XXL by tomorrow.