How should i start a letter to a customer service?

I need to ask some questions to a site’s customer service before i make an order, but im not sure of how i should start the letter. I would be able to do so in italian but i’ve never had to in english.

I’ve looked up some standard business letters in english but it always starts off with “Dear mr/ms/mrs name goes here” And it’s not like i know who’s going to read my letter so i don’treally know what to write.

Should i simply skip the pleasentries or is there some standard formula for addressing “nameless drones”?