1. you have to approach the RERA court u/s 18 for withdrawing from the project and for refund of your money so far paid with interest
2. you can join the bank as a respondent party
3. however if you wish to continue in the project, then too i would suggest that you file the RERA complaint and before the final judgment, the parties can enter into consent terms in which it will be agreed that in case you agree to pay the pre-EMI of the bank, then the builder unconditionally undertakes to adjust the said amount against the final payment to be made by you and also undertakes to handover the possession of the flat within the period stated in the consent terms
4. have these consent terms filed in the RERA court and take a consent order which will be binding on the builder
5. this course is much better than entering into any private agreement with the builder
6. additionally since you would be agreeing to pay the pre-EMI of the bank, take a bank guarantee from the builder which you would invoke in the event the builder defaults in his commitments under the consent terms. This will ensure that there is an inbuilt mechanism in the consent terms itself which will safeguard you in the event the builder does not honour his obligations under the consent terms
7. however if you do not have the funds to pay the pre-EMI of the bank at all then you can simply withdraw from the project and take a refund of whatever money you have paid with interest. That will also terminate the triparty agreement for paying the pre-emi to the bank by the builder
8. the bank has to then recover its money from the builder. however this also depends on what was agreed in the triparty agreement. if the funds were credited to your account by the bank which you then paid to the builder then the bank will look to you for recovery of its dues. so if you get a favorable order from rera against the builder then he has to pay that money to you or to your bank directly. however enforcing such an order will be a headache