If you only have a Dell order number for your monitor, you should contact Order Support for your country.
If your monitor was purchased tied to a Dell computer, contact Technical Support for your country.

They will need the following data -
Email Address:
Name:
Shipping Address:
Phone Number:
Monitor Order number or PC Service Tag number:
Monitor 20 digit PPID number:
Reason:

I bought in Russia, in-store display DELL! To the computer it does not apply.

Give me contact details for customer support DELL in Russia. It is desirable phone number.

I would also like to hear from you comment about my problem. Why the sensor itself is blinking?

Funny, but not on the list of Russia, which sells your products:)

You can contact with engineers and show them my video? Their knowledge base of technical problems can be the case, because he's not alone.

I am in the USA. All I have is this list. I cannot know why the sensor is blinking. The engineering team will have to do Failure Analysis once it gets back to Dell.