As of 2014, Treyarch Studios does not have a customer support number because it is only a designing company and is owned by Activision Blizzard. Since Activision markets and distributes all of Treyarch's products, it has a customer support number instead. Activision's support number is 1-800-225-6588.
The main phone number for Treyarch is 1-310-581-4700, but this is a company number, and they will most likely not be able to help with support problems. Treyarch is a game designing company that is most famous for its work on the "Call of Duty: Black Ops 1 & 2" video games. They are based in Santa Monica, California.