Payments notifications stopped

Log out of Apple ID/iCloud account, force restart your iPhone and then log back in to your account.

Sign out of iCloud on your iPhone, iPad, iPod touch, Apple TV, or Mac - Apple Support

Force restart iPhone - Apple Support

It’s really up to you, you will need to backup your iPhone to avoid loss of data. All your credit and debit cards will need to be verified again.

As an alternative you can try resetting network settings.

>>Reset your network settings

If you're using iOS or iPadOS 15 or later, tap Settings > General > Transfer or Reset [Device] > Reset > Reset Network Settings.

If you're using iOS or iPadOS 14 or earlier, tap Settings > General > Reset > Reset Network Settings.

This also resets Wi-Fi networks and passwords, cellular settings, and VPN and APN settings that you've used before.<<

If your iPhone or iPad won't connect to a Wi-Fi network - Apple Support

It occasionally takes a day or two for the transactions to be restored. If they are still missing in a day or two, the next step is to backup your iPhone and do a restore. If you decide to go that route please post a reply and I can list the steps.