Billing charge

I called you guys to inform you that I was being charged $4.21 during a time when my account was already canceled. I just got an email stating that my credit card was charged. I was told by the representative that there was no charge being made there was no evidence and now it has been charged. I would like to see the credit on this card and then I need you to get rid of the card online as payment method. I am so able to log into my account but I cannot delete the payment method I no longer am with you guys so this needs to get done asap. Thank you you can still reach me at my phone number to text or my email