This number (Complete Recovery Corporation - Murray, UT) claims to be a third party collector for Comcast/Xfinity.  They call frequently to "collect" cable and internet equipment that has already been returned and logged with Comcast.  Comcast reports of everything being accounted for in their inventory, and doesn't know why this number is calling customers.  The operators at the number are very rude, unhelpful, will not answers questions about their business, and they hang up if you tell them to stop calling.  It's all very suspicious.  Numerous complaints on the Better Business Bureau website lead me to believe that this number (Complete Recovery Corporation) is a scamming operation that exploits former Comcast customers by collecting bogus fees and sending them to collections.  I suggest contacting Comcast and the Better Business Bureau and reporting your interactions if you are contacted by this number!