My flight tickets were cancelled due to Covid and now I am struggling to get my refund from GOIBIBO.

I have been told by Airlines on email that they have refunded my money to GOIBIBO but still GOIBIBO is not refunding my money. Please help for it.

I am chasing for so many months

PNR-XB66VT, PNR-WCSH8G and PNR - Z73QN