Aisha, st00281 is right, you should find simply by looking up yellow pages, my advice to you, don't hire free lancers, go with good reputation companies, ask any company to provide to you prior to starting their portfolio and their best price, which you can easily get since market is soooooooooooooo down nowadays. MUST check history of company and see all their previous projects.
make sure you right a contract.

Yalla!