We had a similar situation with Wren. They fitted the kitchen in late 2019. Some of the work was pretty pants. Worktops weren't at 90 degrees, units were not aligned with the worktops. End panels were not square to the worktops. Worktops were not level. Glue lines were visible on the white high gloss doors.
Covid kicked in they had a semi plausible excuse for not sending fitters out.
2022- a "fitter" turned up- she what scowls me asked why the oven door doesn't align with the frame. The Wren fitter tried to pull the oven forward. As he pulled it, he pulled the the oven door off. It is an oven where the door drops in and under the body.
We had to wait 5weeks for Wren to arrange an engineer to fix it.
In our case, we had a secondary oven, but, for example, if I wanted to cook two pizzas, I could only cook one at a tine.