Hi
1) Basically it appears that the builder has constructed Commercial building on a Residential non agricultural land (by using residential building plan approval) and sold it to you and also have enabled you to avail loan from Cooperative bank for purchase of same.
2) SBI has not approved the loan , given that the building does not have commercial construction permission whereas Cooperative bank has granted you the loan without going in to merits of approved building construction plan.
3) Since the property is registered in your name and loan is also in your name, you will still need to continue to pay EMI to service the loan or else your loan account will become an NPA and you will loose your CIBIL score. Please note that cooperative banks will not take responsibilities for mistakes of builders and will insist that you pay the loan / EMI.
4) Your remedy will lie against the builder for breach of contract and damages in a CIVIL Court only as Consumer commission, NCDRC will not entertain your grievance given that the premises is commercial building.
5) You can claim from the builder the costs for
a) Conversion, Regularisation and approval of building permission under commercial category by payment of costs (There will be substantial costs(up to 25% of market value of land) required to be paid to Municipal corporation for conversion from residential to commercial) and
b) Pay the penalties on property taxes till such time the conversion from residential to commercial is approved. You may notice that property taxes would have / will be levied with penalties as the building permission has been violated in your construction.
6) Since the value of property is above 2.30crores, your case will be heard by District Court and cases in District courts are generally resolved faster.
Hope this information is useful.