Contact a local advocate at Calcutta , he will get you stay of NBW warrrant at lower courrt it self on no of issues such as the warrant is in Hindi or not with the copy of the application or it does not give specific details of accused who is to be arrested such as full name , age etc etc.
I have seen that Calcutta advocates are very brilliant ,, you must locate the proper person He will get you stay of warrant from a JMFC court even on his personal surity. Not all are so expert so take efforts it will be worth since after stay unless the NBW is reissued you will not be arrested. Meawhile you can pay the dues.
Mean while get the copy of the NBW from issuing court and apply for its cancellation through advocate at that court with deposit of due money, if rejected you can go for revision at Session court there and if not entertained at respective HC in UP.
But you can get relief from arrest at lower court in calcutta, contact the advocate who knows the procedure.