Your payment is safe. Your credit card information is only seen by Stripe (the company I use for credit cards) or Paypal. No one at Perfect English Grammar has any access to it.
Stripe is certified to PCI Service Provider Level 1. This is the strongest level of certification possible in the payments industry. Stripe processes billions of dollars a year for thousands of businesses.
Perfect English Grammar only sees your name, your email address and your country (not your home address, just ‘Germany’ or ‘Mexico’). I will never, never give your email address or your name to anyone else.
Taxes for your country are included.