Debt collector charging for unpaid bills after account has been closed

[SamLewis1]

I have received letters from Fredricksons debt collectors for unpaid bills. I cancelled my contract at the end of the contract in May 2017 and paid my last bill in July 2017. I contacted customer servcies on 10/01/2018 using online chat and was told the charge was for bills dated August to November 2017, but that this was a mistake and the 'debt' team will be contacted to remove the charge. One week later I get another letter from Fredricksons demanding payment. I called the 'debt' team and they cannot enter my file as I do not have the account number for the account I closed 8 months ago. I was transferred to billing who said they would call me back but this has not happened. Please see attached the chat transcript telling me this charge will be removed, which was clearly a lie!

[Anonymous]

You gave them a 30 day notice for cancellation? (Vodafone's mistake)

Or did you ask them for a PAC and never used it? (Your mistake)

Once you've filled up the form, you'll get a call in 24-48hrs. If they're not able to reach you, they'll send you an email for security verification. Just try to reply as accurately as possible to save time.

If it's their mistake, they'll remove all the charges and ask the debt collector's to close it from their side. Also, they've a seperate department to to can help in the credit file, but I'm not sure to how much extent. 
Best of luck 

[SamLewis1]

Vodafone have called me and the issue has been resolved. It was Vodafone's mistake and the charge has been removed. It is a bit concerning though how easily this can happen - I won't use Vodafone again but hopefully it won't happen to anyone else!

[Gemma]

@SamLewis1 - I’m sorry to hear you won’t be joining us again.

Thanks for letting us know that our credit specialist has been in touch and I’m glad it’s all resolved now!