Report a collection
Click this link: https://yandex.ru/support/abuse/troubleshooting/collections/list.html.
Submit a bug
Thank you for paying close attention to the Yandex.Collections service. You can send us a message describing in detail what went wrong. If you have noticed page elements displaying incorrectly or encounter an error message when loading a page, then please attach a screenshot to your message. We will do our best to fix the problem.
Send a suggestion
Please describe in detail what you would like to improve in Yandex.Collections. We will try to take your suggestions into account while developing the service.