I had a waterproof render applied to an external wall on the premise that it would definitely stop penetrating rain - it hasn't, and I'm struggling to get hold of the company who did it. I've sent an email stating that they have 14 days to resolve the issue before I take further action.
Should I send the same as a recorded letter so I have proof that it was delivered?
Should I send the same as a recorded letter so I have proof that it was delivered?