Xfinity claims I never paid despite my bank statement saying otherwise

Despite being an upstanding customer for multiple years and not believing the fables of horrific customer service, I was finally hit with the poor service many other frustrated customers have been ranting about.

It all started early this month when I went to pay my Comcast Xfinity Internet bill. I noticed that my current bill was DOUBLE what it normally was. Comcast claimed I never paid my bill the past month. So instead of checking my bank account I quickly paid the doubled bill. Confused, since i have NEVER missed a payment on the bill, I decide to recheck the statement through the app and somehow that statement was different and said my normal bill amount. 

My bank statements also showed I had paid the prior month and on time. I asked for half the amount back in reversal from comcast stating i paid too much and they granted it to me very quickly, good customer service on their part at least in that respect.

Time goes on and I receive an email from Comcast claiming that my account is OVERDUE and they will be cutting off service if I don't pay the past due amount. After checking the website, the new statement claims that my last month's payment (which they call "echeck/eft return" in the bill) was unable to be processed and returned back to me meaning I have never paid the last month's bill. THIS IS FLAGRANTLY FALSE as I have checked with my bank and bank statements showing that my payment was processed and went through and I received no return for this amount like Comcast claims. On top of this ridiculous lie, they said my payment was unable to be processed almost TWO WEEKS AFTER i had already made the payment. This is impossible that it took that long to process a payment made online. 

I have already spoken to an IN PERSON customer rep at a store location and they were unable to help me despite agreeing with me that my bill was already paid and Comcast is in error. The in person representative already asked a higher up to resolve this error and they assured us that this would be resolved in a few days. However I have seen no resolution to this with my account still overdue with late fees tacked on.

The in store rep told me I might need to contact the billing department MYSELF to fix this issue. How is that helpful? When someone who WORKS for comcast can't even get in contact with their own billing department what makes a regular customer able to any better? My efforts to contact billing department were met with unacceptable hold periods (30+ minutes) with no contact.

At this point I believe the horror stories to be true. Comcast is able to flagrantly lie and state that your payments were never received and then charge you double with late fees added and give you the run around when you attempt to contact any customer service- with impossible phone/email/messaging wait times or in store customer reps that simply say they can't help you. I hope you are listening Comcast as this is no way to run a business.