cannot deactivate studio 2019 licence/cannot find any licence and therefore cannot activate studio 2021

On december 9, I have purchased a 2021 upgrade from 2019. I have tried to deactivate my 2019 licence in different ways (in the app, online etc.) to be able to use my new software. I have written message to the support service. Unfortunately, until today I have not found or received a solution to this problem.

Please advise

Kind regards

Barthe

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