Unauthorized Selfcore Charge on PayPal Mastercard Debit Card

Today, I noticed a $40 charge on my PayPal-linked Mastercard debit card from a company called Selfcore, even though I have never tried, used, or purchased any product or service from this brand. I did not authorize this payment in any way, and I have no relationship, subscription, or prior transaction with Selfcore that could explain this charge. This situation is unacceptable, as money was taken from my account without my consent. I request that the $40 be fully refunded to my card immediately and that any account, subscription, or recurring payment possibly opened in my name with Selfcore be completely cancelled and blocked against future charges. I also ask for written confirmation that this refund has been processed and that no further unauthorized transactions will be made from my card by Selfcore.