Garage Door paid for, not installed after 5 months

I requested a quotation from Andre of DoorTronix / Big Time Industries for a Single Caravan door, he supplied the quotation, payment was made on the 3rd of May 2022, today being the 5th of October after many attempts of contact, no calls answered, messages are responded to when he feels like it, after multiple failed promises to install the door, to date no door has been installed. It's been 5 full months waiting for a door that was paid for in full to be installed.