Can I ask for Refund from builder when he delays the possession by 2 years and charges Interest also

Hello everyone, I have booked a flat in a Xrbia Riverfront project in Pune in July 2014.I made the payment according to their schedule and got officially registered the flat in 4th July 2015,I got payment details & allotment letter & everything with me,it is mention in the registration agreement that builder will give the possession within 30 months from the date of registered agreement (which is [deleted])he started calling me to take the possession from march-2018 but since he does not have OC/CC I did not take the possession,also I did not pay him the flooring payment of 120000 for flooring as I was very frustrated with them, they started charging interest on that amount,Now he just received the Completion Certificate and he pressurize me to take the possession. My question is as the possession is delayed by 12 months from the registered agreement date & 24 months from the booking date, 1-Can I ask the builder to pay me the interest on the amount paid by me for 12 months? 2-What will be the interest rate for the refund if builder charges 18% on delayed payment from me which is mentioned in agreement. 3-Can I ask for refund of the total amount as I m not Interested in taking the possession of flat in this project anymore. regards Pushpendra Verma