Landlady won't return my deposit

Hi - I need some advice. I rented a room in a house for 2 months - and paid the landlady an 800.00 Euro deposit. She gave me 24hrs to leave the premises, which I did, and I have an email indicating that she would pay me back my deposit upon leaving. She didn't do this. I have now been waiting for over a month to get my deposit back from her. I transferred the deposit via bank transfer and paid my rent via bank transfer. She wrote up tenant agreement stating 30 days notice to evict. What can I do and where do I go to get my money back? Many thanks for any help.

Dear Sir/Madam,

This happens quite frequently. You can advise her she is leaving you no other option other than to contact the police.

We cannot help you.

Yours faithfully,

Many thanks for your advice. I will indeed contact the police.

You're welcome.

I'm sorry we are unable to help you further on your matter.

Regards,