Yandex Disk Bonus Space Not Credited After Campaign

Brand: Yandex
Service: Yandex Disk – “Use for 3 days, get 5 GB” campaign
Account: y***************@gmail.com
Location: Turkey / Şanlıurfa
Date & duration: Since November 10 — completed 3 days, but 5 GB has not been added

Issue:
I used the service for the required amount of time according to the “Use Yandex for 3 days, get 5 GB” campaign, but the additional 5 GB of storage was not added to my account. I did not receive any warning or error message.

Actions I took:

I completed the required usage under the campaign.

I waited for a response from support channels, but I have not received any reply.

My expectation:
I request that the additional 5 GB of storage be added to my account (y***************@gmail.com) as soon as possible and that I be informed about the reason for the delay.

I kindly request the necessary action.