Instead of I regret to inform you

I want to know the other sentences we can replace for I regret to inform you.

Dear

I regret to inform you in your E-mail dated January 04, 2012 you have indicated that total number of goods is (200 Boxes)

, which does not agree with packing list details (300 Boxes) our forwarder have received. Due to this

inconsistency they cannot finalize transportation of goods. You are kindly solicited to provide us

with the exact and accurate number of goods.

Thank you for your patience and cooperation in this matter.

Best regards