i want to make a complaint

I could not get a cable tv signal.  I called Xfinity and went through the automated assistant.  It said that if the restart did not solve the problem, they would connect me with a human agent.  Instead, they kept sending me texts with links I could not open.  How do I get to a human being who can help me with my problem?  I am seriously thinking of cutting the cord, as there is no customer service I can use and there are constant problems.