Headdesk

I spent almost 2 hours today trying (unsuccessfully) to get the correct phone number for Lost and Found airport in Berlin. The number listed on the internet (and it is also the same number in the airport system) is apparently not correct, as calling it connects one to a man who keeps saying that this is not lost and found, and he cannot help. Relaying this information to the main airport switchboard does not have the desired effect.

Any ideas for how I can find the correct phone number for Lost and Found at Tegel?