He confirmed that the nominee name can be used to open other accounts, so he has full control over him or his identity. It means the balance is taken by Alex, not some random dude. Can Alex do that?
How did you make this connection? Where is the proof that he is stealing money or took your money after your agreement expired? From what I can see, Alex has confirmed that one nominee can be used for multiple people (this is irrelevant in itself) and since the account is theirs, they (the nominees) take control of whatever is left in the account after the service expires.