Godrej Properties Limited - Tri-Party agreement and NOC not recieved

I have purchased a flat in project Godrej infinity GITT*A****. Exactly * month ago I had requested NOC and tri-party agreement from Godrej as I am planning to sell the under constructed flat in Godrej infinity. I have till date not received it. I have made several attempts from my side to expedite the request, I have followed up via email as below, made several phone calls to both my RM and the service centre. My wife has visited the website office numerous times in order to help push this matter forward. All our attempts have been in vain. This kind of delay is not expected from such a reputed and renowned company. Everywhere I look in their offices they mention a customer-centric approach. Yet on ground level, I have not received the same support experience their your side.
I wish to bring why I am pressing to get this NOC. I am paying EMI's on the property in tune of ***** per month. The buyer was ready to complete the tri-party agreement using his personal lawyer about a month ago. Each day that I spend waiting for the support is an extra **** Rs I spend on bank interest. Also, there is a potential for loss of our buyer if they decide that the process is taking too long and back out of the deal who would be held responsible?
Any lawyer that I consulted told me that they could set up a tri-party agreement within a week and execute it in another. So roughly * weeks for the deal to close. Also, they charge anywhere between ***** - *****. Please explain to me why Godrej is taking ***** from me for the same process and taking at least twice the amount of time to complete the process.
I have read about all the customer satisfaction awards that they have received, but in practice is there anyone who is able to get involved in my issue and get it to closure?
This kind of experience would have been fine if it was a local level builder with little or no experience but not from such a big company with the enormous resource at its disposal.