Need escalation to remove charges from a duplicate account

Hello, I'm writing in the hopes that I can escalate this matter and not have to take any further action and posting this so I have a written record of my concerns.

When I moved in April, I was chatting with xfinity to set up an account at my new address. For some reason the account they helped me set up didn't work so they told me I had to call customer service. I did and apparently instead of fixing the issues with the account already set up they just set up a new duplicate account at the same address.

I was billed twice. I tried calling customer service and the first two times they denied the fact that there was a second account. Then finally the third time I called someone told me about the duplicate account. I was told it would be fixed and it was not. I called again a month later, was told it would be resolved, it was not. It still says I owe money on the duplicate account. I called again today--was told it would be resolved but we had to open a ticket. Got no email that there was a ticket opened, logged into my account it said there are no tickets?

The amount of time and energy I've put into resolving xfinity's mistake, when it should be a quick fix is wild. I am hoping someone sees this and it gets escalated to someone who can actually resolve my issue. I will soon be making more formal complaints to get this escalated and resolved.