Goibibo - Refused to provide refund for a cancelled flight and charged extra charge than difference between ne

Booked ticket through goibibo with PNR-NZTYZB on February ** for ₹*****. The flight was operated by Emirates and date of travel was **/**/**. The flight got cancelled due to restrictions due to covid restrictions. When asked for refund goibibo refused to provide it and gave an option to reschedule before a deadline **/**/**. I since had no other option resheduled the ticket with PNR Q**MRW for **/**/**, the price of the ticket shown while booking was ₹*****. I already has paid₹***** for my earlier ticket and was supposed to pay the difference of ₹**** but goibibo charged me ₹*****. When complained about the issue to goibibo thet simply mocked and refused any redressal.