Cleartrip — not received refund and credit shell

Very pathetic customer service from cleartrip. I booked a flight from bangalore to kannur for march 26th 2020 through cleartrip. As flight got cancelled then indigo gave confirmation regarding credit shell. The amount i paid for flight is 4800 inr. Credit shell balance is 3500 and they confirmed remaining 1100 they will give me back as refund. However i'll have to book my next flight through cleartrip only to use credit shell. However they are not responding in calls, emails and even in websites. I need my refund amount as well as credit shell. If necessary action is not taken by cleartrip then will proceed through court only as none of this happened is not my mistake.