HP / Webcam — WEBCAM PICTURE QUALITY IS BAD

Dear Sir/Madam,

I had bought one webcam from a shop located at Hyderabad .
The shopkeeper did'nt cheked the webcam at that and said its perfect because it is from HP.
I did trust on him and taken it.
When I installed the required software and tried to fix, i was not getting good picture quality.
So I went to shopkeeper and requested him to exchange it or give me higher version of HP.
Now he is refusing to do either.
Kindly advice.

thanks and regards
Hemant Goel
Hyderabad