Vodafone — Customer care not available in Midnight

My dad mob was stolen. To block the dad number I called the customer care number. They send link via message. But in the link I cannot block the number because there is no alternative number and mail id. I tried to speak to the customer service but the call was cut down stating that customer care service was not available in between 12 am to 6 am. For an emergency purpose how do I contact the customer care. Customer care service should be provided 24*7. To block the number atleast they should provide options like Airtel where they ask Aadhar and birthday. Airtel number was blocked in just one call and within 7 minutes. Vodafone customer care number ends without any reason only one time it state "manikavam" and the call was cut down. Remaining multiple times call was cut down without any reason. My mom Vodafone number has active plan of Rs.2399 but still I can't reach Customer care service because my mom Vodafone number has no main balance. This is very silly. How can they don't provide customer care service for not having main balance but still having active package worth of 2399? Worst Vodafone network.