Consumer Redressal

Hello, I had booked an apt with GM infinite builders and developers by paying 1 lakh booking amount but was unable to go through as i was unable to raise and the property also was a B khata property which my lawyer pointed out while verifying documents which was not acceptable to me. The builder has been coming up with excuses for refunding the booking amt . I have already submitted application for cancellation and refund twice to them since the builder told me he didnt receive it first time . Its been over a week since he told me he will give the money back and over 5 weeks since i have asked me for redund. What are my legal options here as i dont trust the builder at all and have doubts that he will refund 100 % as was verbally promised by him