DDA — DDA housing scheme 2019 refund not received

I am Hemant applied in DDA housing scheme 2019 1st time i got refund.
but I was in waiting list for that i again submitted Rs. 2 Lac by challan / online payment in Dec-2019 for waitlist draw. Again i was unsuccessful but my refund of Rs. 2 Lac is still not received.

I have call so many time on DDA CC no. and emailed but no response.

Please guide me how can i get my refund.

application no. 800275

Thanks,
Hemant