Won't stop billing me when service was cancelled [Edited] 11/22/24!!!!!!!!!!!!!!!

I've had the same issue.
I canceled my service on 11/22/24 with a call back and returned my boxes to comcast on 11/22/24.
I had ported my phone number to new provider before cancellation which took two weeks.
Next mouth I get a bill for 179.00 not a refund of fifty some dollars I was told would be credited at the comcast store in Granger IN.

So I call and have trouble trying to get someone on the phone.
After finally getting a hold of someone I get sent to three different people all asking me the same thing, account,street address,PIN then hung up on after 45+ minutes.
I'm told to ignore the bill, it's a mistake and will be taken care of next billing cycle.
Then I'm sent a email saying I need to pay my bill.
So I go online I and set up a call back online again since my account is inactive online. I get the call back after over 30+ minutes and tell them whats happening again and again was told to ignore the bill it's just not through our system yet.
Then I get a new 700.00+ bill in January and call, go through all the nonsense with people I cannot understand and are not/won't allowed to do their jobs.
I'm told again after more a hour that it's fixed again! ask for a receipt to be sent and I don't care about the refund I'm entitled to.
I'm told they can't send me any form conformation but it's fixed finally and everything will be fine again and to ignore all bills sent again from mail/email/text.
I tell them I've heard that three,four times now but I can't get anything to confirm this has happened.
So now in February I get a bill for 303.00 which I ignore then a collection letter threat shows up so I go online but comcast says my account is inactive.
I call to use automated services and they say I can't use it because my account is inactive.
So I try to just call and told the serviced can't be use for my account.
I am not Kidding.
So call up as if to setup new services and after talking to that guy he can't believe what is happening, he says.
So he sets up a call back and after about a hour I get someone, go through all the PIN/name/address/phone number with two people and am told that my service was terminated January the 9th.
I go and explain the whole stupid thing again and he see's all my calls in my history and everything that has happened and that I turned in my boxes on 11/22/24.
He tells me I shouldn't be charged after my boxes were returned to comcast and has fixed it again,again,again,again.
But I can't get any form of of information stating that officially again but to be rest assured it is finally done and I will be getting a refund on the difference in up to two months. 
I just got another Bill from comast threatening to send me to collections with a number to call.
It tells me my account can't be accessed through this number.
Then I get a survey on what I thought of my last interaction with comcast.
I am not Kidding.
They don't care about any of us or the time and effort to just simply cancel services.
When I switched my home owners insurance I had a refund on my card in a week and a half and it took five minutes to cancel.
But any search online shows the unbelievable amount of complaints on comcast on this.
I have a 815 fico score so I'm pretty [Edited: "Language"], I did everything right even went online and called before November to follow all instructions on how to cancel service. These guys are these worst kind...
ERIC [Edited: "Personal Information"].