reactivation license

I'm having problems reactivating my license.
I deactivated it because my computer was broken, and now I have it repaired, but I can not get my license back.
I have the activation key as you can see in the attached file, but SDL keeps telling me that it is wrong.
I can not work or study without it, so I hope you could help me.
I received my license from the school where I study, which is called CTI Communication. I attached you the email they sent me.
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