Completely incompetent customer service

I have moved to a new location where there is no xfinity internet service so I deactivated my service with them. They asked for a return of their equipment and told me to use the link xfinity.com/returns. Apparently, the link gave me error messages, so I called them to figure out how to return the package. Not being able to reach an agent on this specific matter that a bot could not help with for more than 10 minutes was just a tip of the iceberg. Once an agent was reached, she told me that she was working on getting the return plan and then out of blue transferred me to someone else. This next agent gave me a UPS number to call. I asked if there was any information like tracking number or account information to tell them and the agent said no because they would have all the information available already because they have a contract with them. When I called UPS, surely they had no clue how to process the return because they had no information. The agent had straight up lied to me. Furious, I called the xfinity customer service again, another agent gave me a tracking number, confirmed the number with me, but upon calling the UPS, the UPS agent told me that the tracking number is invalid. I had spent more than an hour at this point, so I gave up at this point. The most horrendous customer experience I've ever had, hence I am writing about it. I never bother writing about this kind of stuff because it's a waste of my time, but they are truly incompetent bunch that I want no business with them ever again. They can call me when they want the equipment bad enough and when they have figured out how to schedule a return mechanism, that all the other competitors and online retail stores seem to have figured out already. These guys are a [Edited: "Inflammatory"].