Petcare-Woofz Unauthorized Charge Complaint

Today I tried to subscribe to a dog training service with Petcare-Woofz. On their page they clearly offered the service for $15, and after I entered my card information the amount shown on the invoice suddenly changed to $38.95. I did not accept this change, so I closed the window without submitting or confirming the payment. Despite not authorizing this new amount, a charge of $38.95 has appeared on my bank account as a pending transaction and the money has already been deducted. I am in the United States and my card is in USD. I never agreed to pay $38.95, only the advertised price of $15, and I consider this charge to be unauthorized. I have seen at least three similar complaints reported on the Petcare-Woofz website, which makes me think this practice is not an isolated error. I request that Petcare-Woofz immediately cancels this transaction and fully refunds the $38.95 that was taken from my account, and that they correct this misleading payment behavior so that other customers are not affected in the same way.