Cleartrip — Amount charged; no bookings made

hi, An amount of around 5700 has been charged from my visa credit card - ICICI. There was no booking made through cleartrip and this looks like a suspicious transaction. the date was 24/5/2015. i have the credit card statment showing below: 24/05/2015 CLEARTRIP TRAVEL SERVI 60.68 Dr. 24/05/2015 Service Tax 7.50 Dr. 24/05/2015 CLEARTRIP TRAVEL SERVI 5, 601.97 Dr. there is no reference number shown. also in cleartrip web site, under my account, there is no booking done post 12/4. I have tried reaching clear tri; but there is no number whwre i can discuss this issue with them. there call center options only are for bookings please look into this urgently. thanks,