Hyundai Service Station - Himgiri — Lost my stereo Tweeters

Hi,

I gave my santro car DL 8c 6401 for servicing to Hyundai Service Station -Himgiri on Sat 6th october 2007.
They performed all the necessery formalities with me for servicing the car.

I left my car with them and went back to my home.

when i came to collect my car, i found my sterio tweeters were not there.
They replied when asked that those were not there.
And they shown me the filled form that they have not ticked it present in the car.

and refused to answer me even.
there was no one who can answer my questions.

the recieptant was "RAMBIR".

What to do now.

Naveen Verma