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Hello Bartosz,

Thank you for your request. 
Please excuse the delay in getting back to you due to the enormous number of requests we got recently and our limited capacity to support complimentary subscriptions.
The problem with the renewal is caused by the existence of several JetBrains accounts linked with your name. We would be happy to help you to solve your issue, and will just need a little more info. As you got an auto-approved student subscription, please send me the email addresses that you used for getting student subscriptions in the past, your GitHub username (if any) and any officially issued document in the PDF format with your full name and confirmation of your current student status in 2024/2025 academic year for validation of your JetBrains account ownership and
eligibility.
After getting this documentation I'll help you to solve the issue by merging your accounts into a single one for your convenience. 
Thanks, I look forward to your response.