I would be speaking to a lawyer straight away and getting seriously **** uppity about this. Damn right you’re entitled to get him out to look at the place, if you’re not already considering hauling his cheapskate piece of shit arse to court for compensation he’s incredibly lucky. I am a landlord by the way (via work, not buy to let), shoddy work like that leading to physical harm to your tenants is Officially Not On.
The fact that the landlord may have paid a kitchen fitter to fit the kitchen, and expected him to do it properly is evidently lost on you. As a landlord, would you stand over your kitchen fitter and inspect their work? Would you take the units off the wall to inspect the fixings once they’re gone? No.
The only time I could get arsey with a landlord over this type of incident is if it was a DIY job, and the landlord had been negligent.
I would expect him to refit all the units immediately with the correct fixings though.