Фотографии исчезли с iPhone после покупки iCloud

If all photos are gone and are not in your Recently Deleted album you have to use the backups you made while the photos have still been on your iPhone to recover them. The Recently Deleted album is the only safety line offered by Photos, sorry. What kinds of backups are you keeping?

Trying Google Translate:

Если все фотографии исчезли и их нет в альбоме «Недавно удалённые», 
вам придётся использовать резервные копии, созданные, 
когда фотографии ещё были на вашем iPhone, чтобы восстановить их. 
Альбом «Недавно удалённые» — единственная возможность для безопасности,
 которую предлагает приложение «Фото», к сожалению. Какие резервные копии вы 
храните?

If you have been using iCloud Photos, you need a backup a computer.

iCloud Photos is a syncing service, not a backup. Any photo you delete from Photos on your iPhone will be deleted from iCloud as well, to keep your iPhone and iCloud in sync. And when we are using iCloud Photos, the iCloud backup of the iPhone will no longer include our photos.

Perhaps you can find your most important photos in any apps where you might have shared them with someone - look in your Mail or Messages and or any social media where you may be participating. If you have a computer, check the the backup of your computer.