A real estate agency shared my chat log with a tenant, can I sue them?

Dear Sir/Madam,

I have had dealings with a real estate agency regarding several of my properties through WhatsApp.

Recently, I was given a full copy of the chat log, including all conversations, by a new tenant.

Is the real estate agency allowed to share the conversation between me and them, including the full chat log, without my permission?

Can I sue them for this, and what sort of compensation could I receive?