EvgeniyNP: Unfortunately no. I tried that. It says that the code is activated and the game will be added, but it did not appear in the library
pds41: Have you tried:
https://www.gog.com/user/refresh If it's still not working, you probably need to raise a support ticket or PM a blue on the forum. If you didn't try to redeem the code when you bought the game, and assuming that you are indeed based in Russia, you might find this challenging as following the war and invasion of Ukraine new purchases from Russia and Belarus have been suspended (see tag+'s post above).
If you hadn't redeemed the code before March 3rd, you're in an unfortunate grey area that would need to be discussed with GoG staff directly.
I wait answer from support.