Go First — refund of cancelled tickets

I booked a flight ticket from Bengaluru to Patna with Go First for 23rd July 2023 using Goibibo. The airline cancelled the flight ticket on 28th June 2023. Since them I have talked to customer care both of Go First and Goibibo, but I they both told me that I would get the refund. But it is about an year, and I haven't received any refund.
Please help me get my refund.