Zucora Home review: Home appliance warranty

Bought double oven LG range at The Bay who deals with Zucora home. Started claim in July 2021 due to issues with ovens not functioning correctly. First technician they sent out in July said needed to order a part, came back in August and part was wrong so had to put back old part and reorder; came back in September and part didn't work so was supposed to reorder and come back but in late September when i called him to enquire i was advised that he was closing my file as Zucora was refusing to pay him for his trips out to me thus far. Zucora then enlisted a new technician who came to me on October 18th, again stating a new part had to be ordered. By November 15th, not having heard, i called him and was told that he'd not ordered the part yet as Zucora had not approved his request to do so. I sent an email to Zucora on November 19th, to which they have still not replied and i chatted live with an agent yesterday who lied to me and said they neither of the two technicians had ordered any parts for me (obvious lie as I was here both times that Technician #1 brought new parts) and so they were sending me a third technician who would "contact me shortly". I demanded to speak with a manager as this has been ongoing for 4 months now and they promised one would call me within 24 hours. 24 hours was up 2 hours ago and still nothing. I'm stuck dealing with this company as the merchant uses only them for the warranty.