Makro Bad service

I have bought a new Defy Gas hob and Electric Oven in April 2022 and only installed it in my new residence in July. The thermostat has not working since day one. Defy sent a technician out and the part was ordered and has STILL not arrived. Macro got permission to replace unit but can't supply me with a date to do so...its been 1 month without an oven!!! Its unacceptable!!! I have now spent 77 minutes on hold for a company that clearly doesn't give a hoot about customer service!