TECHNICIAN INCOMPETENCE

I have purchased a fridge just after lockdown in month October .I didnt have a technician come out then and made a 2nd compliant .I needed to defrost fridge cause the tempreture isnt cool on top but when temp is increased it freezes the bottom where drawers are stuck.I have lost alot of monies having to defrost meat and fresh produce .A technician sceduled to have an appointment calls for address when it was given ,he didnt pitch up he made promises to come over the weekend.I had to contact him to find out whats happening. Its now Wednesday and he hasnt gotten in touch and i choosen to not waste my airtime and time to call as his not competent to do the job provided. I need to know whats the process from here as i need urgent feedback and also raised it with Homechoice