BBA not issued by Property Builder

I have booked Property Flat in Greater Noida with Builder in 2013. Application for and payment plan has been signed. I have paid the 98% property cast as per the Construction link plan. Now Buodler has stopped the work and not comminicating , no reply about the constrction and possession related. Builder has not still issue the BBA to me and not detailing for the when complete constrction of property. My points are 1. Who is responsible for not issue the BBA. 2. How builder can collect more than 15% i.e. booking amount without issue the BBA. 3.After too much argue and follow up now Builder insisting to issue the BBA from current date of 30 Jan 2021 while my flat booking is 24/09/2014.and the last payment made at 7 Feb 2017 to reach total paid 98% money. which is also above the constrction link plan. As per link plan , before possession , they can collect only 95% cost of flat. 4. I urge builder that BBA should be with effective date as Application date means 24/10/214 and can not accept as 30/01/2021 date. Please advice as for me it is builder mistake to issue the BBA and wihtout BBA , he has collected 98% cost amount. It see,s like a finaciala cheating case.