17 years experience. Work speaks for itself.
Always a joiner in my opinion.
Plasterers can normally board and skim, but if they have plenty of work on. they can earn more just skimming. you can get tappered boards. so any decorator can fill and paint.and it looks the same as plaster. only if they are good......
You can get made to measure doors made. these are more expensive. but the size is the size. a decent joiner will be able to sort this for you.
Do not let this man back in to your property. send me pictures and i am more than happy to advise you.
If you send pictures, i'm more than happy to advise. this scenario does seem very strange.