If the subscription is created on PayDotCom.com Or PayPal.com Or Stripe.com Or ClickBank.com account, you can simply login into your respective account and cancel the subscription. You can Google the steps to do it.
If you can't find it or unable to do so, then kindly drop us an email at firstname.lastname@example.org with the following details:
Subject: Cancel My Subscription
1. Paypal Email ID or Stripe Account Email (Your payment account email through with you made the purchase)
2. Paypal/Stripe Transaction ID.
3. PayDotCom Transaction ID or ClickBank Order/Receipt Number
4. Product Name
Note: Please make sure you are writing us from your Sign-up email or payment email so that we can track your record correctly and deliver a prompt service.