Hello
Support doesn't just manually activate any license.
Can you please provide a bit more context -
Is this a full Pro license, or an upgrade pro license (from home to pro)?
What type of hardware has changed? Motherboard?
How did you obtain your license initially?
Did it come with the device preinstalled, or did you purchase it?
If you purchased it, did you purchase from Microsoft, or from third party?
Is it originally a Win7/8 key?