How can I activate Microsoft Office on the laptop?

I have an Office account and would like to use it on my laptop [Windows, not Apple]. I have already downloaded it and now need to activate it. "Problem, try again in a few minutes." Should I delete it and download it again or what should I do?
Thank you in advance, I absolutely have to solve this problem.

You should also be able to activate it by telephone.

Unfortunately, this option does not work.

https://support.microsoft.com/...e-DE&ad=DE