Builder not providing documents in time, now charging Interest

I booked flat in Residential project in Jogeshwari, west, Mumbai in December-20. I paid booking amount.I am sending many emails of documents required to complete Agreement as per documents mentioned in agreements. Builder is not giving me proper documents as per agreement and Bank loan till today. Now send me Interest Debit Note. Now builder is saying me to apply from their bank only and finish procedure in 7 days otherwise need to pay interest @ 2%. What can I do? I have all email communications of Builder is wasting time and not providing documents.

MAK VAT
MUMBAI 401102, Maharashtra
Email: pxxxxxxxxx7@gmail.com