ntracts 5. Marc canceled his Comcast cable service. When the cable guy removed the Com- cast equipment, he mistakenly left behind a modem worth $220. By some this amount was sent to a collection agency. Upon discovering the error. Mare returned the modem to Comcast, which promised to correct his account. But the mistake remained on Marc's credit report. Because of the error, Marc had to pe an additional $26,000 when he refinanced his mortgage. Did Comcast violate in duty of good faith? mix-up