MatchPub Charged Me Without Consent—I Want to Cancel

I never signed up for a MatchPub membership, yet somehow, I was automatically subscribed, and they have started charging my account without my permission. This is completely unacceptable! I want to cancel my subscription immediately and receive confirmation that no further payments will be taken. How can an app charge people without their explicit approval? This feels like a scam, and if my membership is not canceled right away, I will file a formal complaint and take legal action if necessary. I expect a quick response and a full cancellation immediately.