I Would Like To Delete My Payment Method

What do you mean with delete your payment method?

If you want to make purchases or update / download apps, including free apps, you need to have a payment method on file.

See ->  If you can’t download or update apps on your iPhone or iPad

You can change your payment method, see -> Related Article: If you need to change or update your Apple ID payment method

If you don't have a credit card or don't want to use a credit card, you can also use your Apple ID balance as payment method, see -> Add money to your Apple ID balance

Add money to your Apple ID balance – Apple Support (UK)

If you update your payment method or add funds to your Apple ID balance, It would take about 1 to 3 business days in order to process.

If you're still unable to update your payment method, Contact Apple Support.