Landlady didn't protect deposit

Hi all.

To give you the short version, my landlady refused to use a deposit scheme and only gave me back £500 out of the £650.

Part of me is raging and wants the rest of my money whilst another part of me is not really up for the time and effort it'll take to get the rest back.

Does anyone know if I can at least report her for not using a scheme? I have it through messages that she didn't.

P.S, im in Glasgow, Scotland if that makes a difference to who I should contact.