Mr Shopper changing delivery date

I ordered from Mr Shopper and my order was supposed to be delivered on the 3rd of December, I was contacted and told that my delivery will be late and I will be getting my order next week meaning this week they said they will call me to confirm the delivery date and time. I received an email from them on Saturday saying my order will be delivered on the 10th. They asked me if I wanted to wait for my delivery or get a refund. I have already been waiting getting a refund will just make me do the shopping process all over again which is a waste of my time. I am not happy with the service