Unable to get statement from an cancelled account and unhelpful agents

I've contacted Xfinity a couple times, and nobody can help. They all sent me a link to the current statement in my new account. Nobody can solve my problem. The last agent I talked through the phone call in the billing team was basically terrible. He held me on the phone for almost an hour and started ignoring me and all my questions, pretended not hearing me and holding me on the phone forcing me to hang up the phone. I can't understand why it could be so hard to just get a copy of statement and why every time it is so difficult and time consuming to contact Xfinity.