You can update your details in the app by tapping the profile icon bottom right and "Personal details". Here you can update your address, phone number and email.
If you want to update your phone number, make sure you enter the correct number. You will now be signed out of the app automatically, and you will receive a verification code by text that you must use to sign back into the app to verify your updated phone number.
If you want to change your email, make sure you enter the correct one. You will now be signed out of the app automatically, and must log in again. If you report an issue to us (etc regarding a refund), we will contact you on the email you have registered. If the email is incorrect, we will be unable to assist you.