How do you talk to a live person?????

I just got a notice on my account there is a $230 dispute on my account. I have no idea if this is a charge someone put on my account because I have been called 3 times in the last two weeks by someone claiming to be with Comcast that I know is a scam. However, they have my Comcast Account details which bothers me a great deal.

How can I talk to a live person to findout what is going on with my account.