Overdue refund from faulty engine

Took delivery of a vehicle I purchased on 17 October 2023 from the Dome. On my drive home engine was about to seize. The vehicle was sent back for a full refund which I was promised I would receive at the latest 1 November 2023. Today is 3 November and still no refund. I've sent 2 emails to *** and he does not have the courtesy to respond. The only communication I get is from the sales lady but those have all been empty promises so far. I was supposed to have taken delivery of my new vehicle purchased from a dealership 5 days ago but without my refund and the finance being cancelled I can't to this. In the meantime I'm being inconvenienced using an Uber. This is the 4th vehicle I purchased from them. The engine in the mercedes siezed and Webuycars did not take any responsibility for this. The other vehicle that I purchased from them has been more in the workshop then with me. They do not disclose the major issues on their vehicles and then hide away from taking responsibility. I would not recommend anyone buying a vehicle from here.