Refund without concert

I have booked a unit T08 A in project "Smart World Gems" , located in Sector 89 gurgaon in April 2022. RC/REP/HARERA/GGM/502/234/2021/70 is the RERA number of the project. The Builder is M3M Smart World. We cleared the initial 10% amount at the time of the booking thru 3 different cheques. Against the payment Builder had giving us cheque receivings, a gift voucher to welcome us and confirmation over the email that they have received the 10% payment. In last 20 months I visited their office multiple times asking them to provide me documents and sign BBA. But every time I was told that they haven't received the RERA for the Tower in which my Unit is located. So, on the name of the documents I have cheque received, Payment confirmation from the builder over the mail, copy of signed 10:90 plan and signed price sheet. Now, since Nov 2023 , the builder reached out to me over WhatsApp pressurizing me to clear the 50% of the TCV, failing which they will cancel my unit and refund the amount in my account . I told them that I don't have money and I will go with 10:90 payment plan T&C. Better your get the RERA , sign BBA and engage Bank for the agreement to raise funds . But Instead of opting the right path , today they refunded the money in my account without my consent of cancelation or withdrawal of the unit . I waited for almost 20 months for the unit and my money with Builder only against the booking. I want to fight for my case as my intent is clear that I want my booked unit as per the payment plan agreed . How to proceed strongly on this further. Please advise . Also, As a very first step I want to obtain the stay from the court to stop the further sale of my booked unit T39 C) . Please guide ASAP .