Zero chat security/accountability

I am pretty sure I was involved in an attempt to steal my information. I was asking for billing assistance, speaking with an xfinity chat agent (through xfinity webpage) and in the process, a random screen with a Halloween video appeared that was not a part of my browser but a running program on my computer. This was not a program of mine. I quickly tried to force shut it down, not knowing what it was, and the agent then proceeded to tell me I needed to leave any background applications running for chat purposes. LOL. REALLY?!? I then turned my computer in airplane mode, hoping I was safe, and restarted. When I returned to the chat, to hopefully get someone else, I noticed my chat window was still showing the history of the old chat. I attempted to download the chat history, figures, "chat transcript was unable to download at this time"

Xfinity needs to be held accountable for hiring these help centers with zero security and theft. 

PLEASE BE CAREFUL CONSUMERS.