Reminds me of the time my wife cancelled our internet with Vodafone and three months later we got a letter to say our arrears were being referred to a debt collection agency.
I spent an hour on the phone, talked to 8 different people to only end up back at the 1st person.
They claimed we only cancelled the direct debit and not the account, I agreed that they would pull the call and if that was the case I'd pay what was owed.
As soon as I was off the call I got a mail to say that it would cost me €6 for them to listen to their recording.
I got mad and looked up the CEO of Vodafone Ireland and found her direct email on a chamber of commerce website and email her a polite description of my experience.
10am next morning I get call from the head of customer service apologising and advising me that all fees had been waived, a win so I thought.
A week later I get a call from HR asking if I had emailed the head of Vodafone from my work email, we had a corporate account and Vodafone complained that I had emailed their CEO using a work account on a personal matter.
I could see the person in vodafone who checked who I was on linkedin the day before I got the call from HR.
That was over five years ago and I still get annoyed, gits!