I can not delete a payment methode in my apple profile

See -> If your Apple ID is greyed out in Settings

If your Apple ID is greyed out in Settings - Apple Support

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If you can't click your Apple ID

1. Go to Settings, then tap Screen Time.
2. Tap Content & Privacy Restrictions. 
3. If Content & Privacy Restrictions is turned on, scroll down to the Allow Changes section.
4. Tap Account Changes, and set it to Allow. If asked, enter your Screen Time passcode. 

If you can't click other options in Settings 

1. Go to Settings, then tap Screen Time.
2. Tap Content & Privacy Restrictions.
3. If Content & Privacy Restrictions is turned on, scroll down and check if any settings are set to Don't Allow. 
4. If so, tap the setting, then choose Allow. If asked, enter your Screen Time passcode. 

or:

See -> Use parental controls on your child's iPhone, iPad and iPod touch

Use parental controls on your child's iPhone, iPad and iPod touch – Apple Support (UK)

• 👉 Check restrictions -> tap Settings -> Screen Time -> Content & Privacy -> scroll to Allow Changes.

or

If you have a MDM profile, you need to contact your company - IT department.

Try to verify your payment information, you need to Sign in to your Apple ID account page and edit / update your Apple ID details -> https://appleid.apple.com                                                     

• On the Sidebar click Payment methods -> then tap Payments Methods and tap Manage payment method.

or

If you need to change or update your Apple ID payment method

If you need to change or update your Apple ID payment method - Apple Support

• If you want to change your card, you need to add first the new card, then remove the old card.
• or if you want to use your Apple ID balance, you need to set your Apple ID balance as your default payment.

or

Add a payment method to your Apple ID

Add a payment method to your Apple ID – Apple Support (UK)

• If you want to change your card, you need to add first the new card, then remove the old card.
• or if you want to use your Apple ID balance, you need to set your Apple ID balance as your default payment.

See also the following Apple articles:

Payment methods you can use with your Apple ID

Payment methods you can use with your Apple ID – Apple Support (UK)

fyi: Not all credit & debit cards seem to work with App Store / iTunes Store, try a different one, or preferably a credit card.

If your card is not accepted as a paymenf method, you need to contact your bank.

Remove a payment method from your Apple ID -> Remove a payment method from your Apple ID - Apple Support

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If you can't remove a payment method

If you have subscriptions like iCloud+, have an unpaid balance, or you use purchase sharing, you must keep at least one payment method on file.

• Do you have a subscription? You can cancel iCloud+ and cancel other subscriptions from Apple. When your subscription period is over, remove your payment method.
• If you're in a Family Sharing group and you use purchase sharing, the family organizer must have a payment method on file. If you're the family organizer, turn off purchase sharing, then remove the payment method.
• If you have an unpaid balance, you might not be able to remove a payment method. Instead, change your payment method.
• If you still can't remove a payment method, contact Apple Support.

If you have followed all the steps and instructions and if you still need help, get support from Apple directly -> Get Support or call Apple in your region see -> Contact Apple for support and service or check -> here for more support and assistance.