Was the web wallet the type you have control over your private key or the centralized wallet were the service providers can access your funds without your permission. I'm trying to understand what really happened because sometimes hackers target web wallet to withdraw coins of newly launched projects. The team haven't confirmed that they were the ones that withdrew the coins (that's just the evidence I was looking for when readings your OP).

I'm sorry for your lost but right now we just have your word  against theirs, yours is saying "they withdrew the coins"  while theirs is saying "they didn't". Maybe if you can get more affected individuals to come state their experience or give us more reason to believe the team moved the coin then will can tagged the account representative on the forum and also support your flag (when you create one).