Messed up account

I have been with Comcast for years and am listed as a Diamond member. I currently have NOW internet but it is not recognized when I sign into my account to claim access to Peacock, it tells me I don’t have NOW service on the account. If I log into the NOW site it shows my service with the same account number, but the xfinity site does not see the NoW service. I have spent hours chatting with support online, all claim they can fix it then give up and transfer me to someone else where I have to start over explaining the problem. I’ve probably chatted with 15 different techs. There appears to be duplicate account info that needs to be merged into one so I can claim Diamond member services.  Who can I talk to to get this fixed?