Cant even upgrade my phone

A week ending with today of fighting with xfinity about upgrading my phone which is eligible for it for the new 18 pro max, takes my money then glitches out on my end and agents end im sick and tired of xfinity and their [Edited: “Profanity”]  infrastructure i just want to upgrade my phone!, but nope throw a 7 year customer into the back burner for 10 days with no solution, im stuck with a phone i do not want anymore because i run a business and it is useless to me iphones are built for business and i need one, P.S Im a software engineer and this is sad that they [Edited: “Profanity”]  their infrastructure and website, other than that im calling it quits with xfinity for good i will be letting anyone that comes into my IT Business to get far away from xfinity.