Fraudulent practice by Comcast

I have had Comcast for years. I have internet and streaming service. But, for some reason, someone at Comcast create a 2nd account associated with my home address. I was unaware of the 2nd account which Comcast was using to double bill me for the same service. I have always kept up on the primary account and am current up to March. The secondary account accrued $268 dollars and then the service was "cut off" (no idea what that means since my service is working fine). Because I wasn't aware of this second account and it wasn't being paid, they turned it over to a collection agency and my credit score suffered a 50 point drop. I was only aware because my credit monitoring service alerted me. I called and talked to an agent who said he could see that someone setup the account in Aug. and then it was closed in Dec. at which time it was turned over to the collection agency. Even though the agent admitted it was unscrupulous and didn't know why someone would do that, he basically told me there was nothing they could do about it and suggested I just pay it to make it go away.

I will not pay it as this is criminal on the part of Comcast. I have already filed a complaint with the Illinois attorney generals office and will be filing  a complaint with the BBB. If this is not corrected, my next step is to discuss this with a consumer rights lawyer. 

I don't know if this was accidental or malicious on the part of Comcast, but I will not pay extortion and will do whatever I can to hold Comcast responsible for this fraud.