Can supplier dictate my marketing strategy?

So I place orders for a television service company, I am an authorized retailer, and in my contract it dictates that we are not allowed to "cold call." Aside from how people feel about cold calling, when following local, state, and federal laws it is a legal and good advertising tactic; so my question is, is it legal for the company to dictate my private marketing strategy. They seem to have many rules relating to how I conduct my business.