They don't really know what they're doing and declined to fix what they screwed up
The engineer was polite and helpful (and on time), but all positives stop here. He had to come back 3 time to fix the burners. The day after he fixed the burners the oven stopped working. After calling, escalating, calling again the engineer came back just to tell us that the repair work he has done has nothing to do with the oven and we have to book and pay another appointment to fix it. Very hard to believe.