How are you supposed to trust a firm who cant even be arsed communicating.
You don't, you just move on to others. I've never bothered trying to re-contact tradespeople who've been no-shows. It says it all to me if they can't be arsed to turn up or re-arrange.
Because there's a shortage of tradespeople, many think that they don't need to make an effort, hence not turning up, over-pricing, etc.
That's up to them, but they'd better not ring or turn up weeks later when they've suddenly run out of work.
We had a local builder who had that kind of approach. He was highly recommended etc and we had him to do a few small jobs, but he was painful to get to commit - it was always that he'd give us a ring with a start date but he never did, then we'd have to chase, and then he'd randomly turn up without notice expecting to start. Trouble was that he did a good job once he finally got around to turning up. We gave him a years' notice that we were going to have scaffolding put up to paint the house exterior, replace the guttering, etc and asked him to do a roof service (i.e. replace a few cracked tiles, ridges, valleys, etc). We told him what month we'd be doing it. 3 months beforehand, we phoned and told him again - all fine by him. A month before, we tried to get him to commit to a week, but he said he'd phone back closer. When the scaffolding had been put up, we phoned him and told him it was there for 4 weeks. After 2 weeks, we phoned again. In the final week, we phoned and he just glibly said he was too busy that week. So we managed to get another roofer to come and do it. Two weeks after the scaffolding had been taken down, the pillock turned up and was really pissed off that the job had been done. He had expected us to keep the scaffolding (at extra cost for longer time), so he could turn up when he felt like it. A few other people in our village have said the same about him. Now, it looks like he's short of work as he's been walking around putting leaflets through doors. Tough, he's missed his chance due his arrogance and self importance.