Indigo Airlines — refund pnr: emm1fk

Tkt cancelled on 31-01-20 asking for refund since then but only reply i get is that they have processed the refund. As of 05-05-20 i have not received any refund. They are not providing any refund document or any arn no. They also charged me cancellation charges which i saw later & asked for the refund & now they are giving that cancellation charge as a refund in form of credit shell. 1 pnr & two different forms or refund?? Refund in the credit card is still not received.