Confirmtkt — refund is not done even after 2 months

I had booked 2 railway tickets for 9th august from mangalore central to kannur and train got cancelled due to heavy rain. They messaged that it will be refunded but till now, even after 2 months i haven't received my money back. Then they send a screenshot stating refund is done and it will reflect in your account within 3 days but it's almost 3 weeks and no progress. My ticket details are as follows :-

Ticket booked!
Pnr : [protected],
(Maq) to (Can),
Malabar express (16630), 3a,
Dep: 18:10 hrs (09 aug),
Arr: 21:02 hrs (09 aug),

Varsha s nair (Cnf/b1/61 mb),
Pv suresh (Cnf/b1/64 su)

Confirmtkt booking id: tk11622948y45pnr:[protected], trn:16630, doj:09-08-19, 3a, maq-can, dp:18:10,
Varsha s nair+1, b1 61, b1 64,
Fare:990+agent chgs, if any

Trn 16630 source - maq on 09/08/2019 has been cancelled due to unavoidable circumstances inconvenience caused is deeply regretted