File a complaint with the charge card company or the bank that had been paying the charge.

I was charged $8.21 every month and i have never gave permission for theses charges.I don't know why this is happening

it was charged $4.20 on my debit as a book renter.com  I never gave permission for any $4.20 charge let alone on my debit for something I know nothing about. I am going to call my bank right now.