A tenant vacates an apartment without a notice. What to do?

Hi,

I am based in the UK and have an apartment in Dubai. It was left to a Russian/Moldovan who has not paid the rent when due on 24th May.

He gave notice on 8th June and handed the keys back afterwards. He is currently abroad.

There is a full contract and Ejari in place. Can I pursue him for the rent? The agreement also states 2 months' notice and 2 months' penalty if terminated early, so it is a considerable amount.