Consumer case and criminal case can go on same time

Consumer forums offer additional remedy and without any doubt, you can proceed.  Search in google for those judgments with keywords  Additional remedy under CP Act".  I also suggest for filing on line complaint in Banking Ombudsman.

If you are facing problem then you should concern lawyer.

 The criminal case is for the offence committed by the bank authorities and whereas the consumer case is deficiency of service/unfair trade practice and refund of money. Hence the relief claimed are different. Hence the consumer case is maintainable. The findings of the criminal court is not binding on the Dist Commission.

Yes it is maintainable. You cannot get reliefs in Consumer Forum which you can get before the Session Court and vice versa. Beside, no these courts are binding over each other's findings. 

yes, criminal case and consumer case can  be at a same time, there is no bar under the Consumer Protection Act' 2019

There were several decisions both by NCDRC and courts that CP Act is the additional remedy.  There were a number of cases pending with forums and other organizations like Ombudsman, Agriculture dept., weights and measures, and even civil cases.