On May 22, 2018 I upgraded our phones and service at the Dover DE store. We dropped one line and added another. We agreed to paperless billing and auto-pay deductions. I just discovered the salesman did not disconnect the number we gave back and we have been billed for three lines instead of two for 7 months. I thought this would be an easy exchange, I would call customer service and they could easily see the mistake and that the number in question has not been active for 7 months. However, Supervisor Benni said I needed to be "educated" in checking my bills before 7 months go by so in effect I would be punished by only receiving a 3 month credit. I have been educated all right. When this contract expires I will NOT renew with Verizon. Poor customer service ignorant response, completely disregarded the length of time of I have been a Verizon user-done!
Make sure you check your bills with your new provider. They will do the EXACT same thing if you fail to check your bill. They may not even give you the 3 month credit.
It is 100% your responsibility to monitor your bills regardless of which company they are from. By not checking monthly, you agreed to these charges by paying without question.
Even for accounts with autopay, I check them. Rep absolutely should have removed per request, no one will deny that. However, it's up to the consumer to let a business know ASAP something is needing fixing.
I hope you didn't take your frustration of not checking your bill on some poor reps survey.