I need to replace the handles on a Glacier Bay Faucet in the bathroom and I couldn't find any match in stores or online. Is there any way to get the official web site for Glacier Bay or the Customer Service phone number. Note(I don't have the instruction booklet)

This appears to be the Glacier Bay web site. It doesn't appear to be very well maintained.

Glacier Bay Faucets

Glacier Bay is carried by Home Depot.
Most Glacier Bay faucets are manufactured by Globe Union Industrial Faucet Company of Canada , China, and elsewhere. Their brands, besides Pegasus and Glacier Bay, include Danze and Gerber.

Glacier Bay Faucets and sanitaryware
2455 Paces Ferry Road NW
.Atlanta, Ga. 30339-4024
800-220-3036

Hope this helps, Tom