Return of passport from HMPO

Hi all,

I sent my British passport to HMPO as part of supporting documents for my daughters first British passport. I now need to travel abroad for work purposes next Thurs 14 April. Its urgent that I get my passport back, so I have called the PO everyday since Tuesday. The agents have tried to get me through to Customer Service Management Team but I've been on hold for hours. I'm really frustrated and I don't know what more I can do to get my passport back. I've even contacted my MPs office for assistance.

Does anyone have experience in this? Can you suggest something or someone who I should contact? I'm really desperate, and its so important I travel on the 14th.

Thanks in advance.

Pat