How do you remove dmca from an account?

Today my internet was turning on and off randomly and The lady i spoke to today said it was due to a dmca back in June. I haven't a clue what she was talking about. i changed my password and am on a different pc from that time. I changed my wifi password in case someone hacked into my network

In looking up how to resolve it I went to Copyright | Cox Communications but it gives little info on how to resolve it. Im curious how exactly do you resolve it on your account as i see no button, scanner or anything like that.