Absolutely the worst customer service ever! It is unbelievable

I have been trying to get technical support help for 3 hours now for an issue with my outgoing mail server. After 20 minutes trying to get through on the phone to a live agent by  winding my way through their automated phone choices, I hung up and started a chat. 3 agents later and 2 hours of chat the issue is not resolved. The first chat agent said the problem was solved and someone would call me in an hour to check. Not solved and no call. Then I started getting text message about my request. When I clicked on the link it took me to my billing page to accept the offer to upgrade my service. I never asked to upgrade me service so I closed the page. I then proceeded to get one 30 text messages asking to go to the link to accept the offer despite typing "STOP" into the text message.The next chat agent that I was transferred to said " I understand you are moving and would like to move service". I never said anything about moving or transferring service. This agent could not understand my issue with my outgoing mail server. Asked what email I was sending the message to then proceeded to send a test message to that email address and asked if I received it. Well it was not my email address which took 3 attempt to get the chat rep to understand. Then I started getting text messages that I was discontinued from chat service anytime I responded to a question. Then transfer to the 3rd agent who again didn't understand the issue even though I typed the error message in exactly. After I begged for a call from a live agent, I got a text message telling me to call the generic Xfinity number that I had called in the first place. After repeated asking for a call back from a live agent I finally got one only to have this person not understand that I could not send outgoing messages without an error message. He then said he was not technical support but he would transfer me. I am now on hold and have been for 20 minutes. 

This is absolutely the worst customer service and the most dysfunctional I have ever seen. Xfinity should be ashamed and embarrassed