To update your payment method please go to MRP settings page.
Link: https://app.myrealprofit.com/settings/accounts
Then scroll down to see your subscription details and you will find an "Edit Card Details" button to change the card.
Click on the "Edit Card Details" button and enter new card data.
Once you enter new card data, click on the "Change Card Details" button.
Done! If you still have any questions, please contact the support team.