I had bad luck again and my freshly recruited agent ran away.

She started 01/12 and decided today to leave to the Congo per 30/12.

She has a 4 weeks notice period in her contract. Can I claim damages from her in form of withholding her Dec salary in part or in full?
if yes how would one determine the amount?

Urgent please.

And Happy X-mas. Mine is certainly ruined now.