Appalling experience and rudeness by Leaders Home

I’ve been renting through Leaders Home from 2018 until September 2020, not a single month I’ve missed my rental. After informing the agents that I will be vacating the flat, I started receiving a very appalling experience and rudeness where I was even threatened that they will call police on me because of the parking they forcefully wanted to take from me that I’ve been using since the inception. On the 30.09.20 I was told I will not be receiving my Deposit because someone is using that parking, where as I have already vacated the flat and left the town. I want my full deposit as I have left the flat in a state I had found it and I’m not responsible for anything happening at Palm Court premises.