Colive - Deducted my deposit and asking me for more money Threatening me

*. I raised the notice to vacate the room on time that is one month before vacating.
It was a single room in twin sharing.
*. I was expecting my refund to be credited but instead they have charged me more. They are asking me for different different money.
*. No one is answering from customer care. I tried multiple times
*. I even wrote back to the recovery team but they just dont care.
*. Now they are threatening me with a legal notice. Although I could have just paid the amount as its very small but I want to stand against wrong.