It is true, proper validation should be added to make sure duplicate data doesn't mess things up. However, as in my case, I don't full control of the data since I'm using some third party API after my form. So I used this
history.go(+1);
This will send user forward to the "receipt" which is supposed to come after "payment" page if they try to go back to "payment" page (just giving a payment for example). Use sparingly, though
