We do not hold keys to your apartment! Only an emergency locksmith can help.
You can find emergency locksmiths online or in the phone book. We recommend "Piko Schlüsseldienst". It is always available and offers 24 hour immediate emergency service in all of Berlin's districts at a fair price.
Please do not have any building entry-way doors forced open, as you would be liable for the refitting of the house's lock system. Surely a neighbour would gladly help you in this case.