Even though you've already bought the carpet, you can still call technicians who sell carpet as well. Most technicians will work with the carpet whether they sold it or not. I would suggest talking to anybody you know who has had carpet work done recently. Get as many recommendations as you can so that you can talk to a lot of companies while deciding who to hire. http://www.hardwoodfloorsandmoreinc.com/Products/Carpet/
I would ask about in your area so you can find a local installer. I think that getting new carpet is a great way to improve and change up your home! I would like to get some new carpet for my living room. There are so many different colors and styles so it will be fun to pick some new carpet! http://www.mobilecarpetone.com/
Not exactly sure the area you need the installer for? Although I usually like to support local installers..some clients of mine have had good luck with Home Depot..not sure if you need to purchase carpet through them or not though. Good Luck!
I like working with local businesses when it comes to home improvements. Just Carpets on US Hwy 9 Howell has a large selection, competitive prices and are in business for years. They also have a good website showing all of the products they carry..