Welcome to the site: There will be companies that will be happy to take your money, but first we should figure out what is causing the problem.
What shaped roof do you have?
What type of roofing do you have and how old is it?
How much soffet venting do you have? Vented vinyl or aluminum or just a few holes cut in wood.
How many vents do you have on the roof near the peak usually in a row on the back side? and guess at the size
Do you have vents in the gable ends of the house?
Do you have an entrypoint to the attic?
What tupe and thickness is the insulation up there?