Apple Pay for the Gixo app will be canceled on Friday, 11/8 and you will not be charged again. You can also cancel If you want to turn it off yourself before then, you can do that in the App Store. If you get a prompt to cancel subscription payments from the Gixo app, go ahead and cancel them.
When your Gixo membership runs out, you will get an email from Openfit to renew your subscription. Only at this point will you need to add new payment details through Openfit.