Ask an Property Solicitor. Get an Answer ASAP.
Unless you can prove that you were discriminated against, I am afraid there is no case as you did not enter into any legally binding contracts.
The burden of proof would be on you to show that you were discriminated against and that may be difficult to discharge.
May I help further?
I am afraid unless you are prepared to go to court with no guarantee of success and with the risk of facing a huge legal fees bill, you should try and devote your attention and time to looking for an alternative property.
They could argue a host of things e.g. someone else was prepared to pay a higher rent, pay a larger deposit etc etc.
Sorry, but I have a duty to be honest with you.
All the best, ***** ***** on 5 stars