Comcast Cable

i spent over 2.5 hours wasting my time and gas trying to find the address that was displayed on the internet to return my modem. i called the only ph number i had TWICE and was told TWICE how to get there. couldn't find it. a random guy finally told me where the building was and that it was empty - comcast had moved. to where he had no idea. i gave up at that point. frustrated and angry i was driving home when my mother-in-law spotted "comcast payments". i pulled in and in tears explained my situation. the lady said she was sorry and that i was not the first person this had happened to. she just wished that comcast would update the internet info. what?????