What reason did the security guard give as a reason for not allowing u to go in?
If you already have the developer's letter + show prove that you have paid for the maintenance fees & survey fee (photocopied cashier's orders), just not yet collected keys, it does not seem right if you are not allowed to visit the condo facilities since the start date that you are paying for the maintenance fees has started.
Unless the maintenance fees start from the date you collect the keys and not from the date that developer's lawyer asked for payment (e.g 28 January 2014 for 2nd batch)?
I'm going to try my luck on Chinese New Year 1st day afternoon, hope can get in.