Check your deposit is safe
If you have an Assured Shorthold Tenancy (AST), after you have paid your deposit you should by law be informed what has happened to it.
Check if your deposit is protected
Contact all three schemes to see which is holding your deposit and inform them you are problems getting your deposit back. Don’t leave this too long or you might fail.
The three schemes are:-
If your deposit isn’t protected
You may be able to apply to your local county court to get your deposit back if your deposit was not protected by an approved TDP scheme.
You should write to your landlord and your letting agent (if you have one) before you make a claim. Your landlord or agent may offer to pay your deposit back after they get a letter to avoid legal costs.