I am a resident and director of a small block of flats. We have a management company that is managed by a bloke in an estate agents. Recently, I have had suspicions about him. All the flats  contribute £80 a month. I have found out that there's only a few hundred pounds in that account, when I expected thousands. I asked him, by email, if I could see a bank statement. On the 4th email he replied and said that I couldn't see a bank statement. What do I do?