There are multiple reasons for payment errors:
Firstly, please use a VISA or Mastercard credit card.
Debit cards or AMEX cause errors.
Secondly, make sure you have sufficient balance and your credit card is open for international online payments.
If you still receive errors please download our mobile app and try your payment via the App Store or Play Store. Make sure to log in with the same mail address. Please download our mobile app to subscribe via Play Store or App Store.