GoAir — goair flight canceled and customer care not picking up call

I have received a message from go air on flight g8-291 for 10feb'20 that it has been cancelled, where they've asked to call on the customer care number for further assistance. I have been calling so far, and nobody seems to pick the call. What sort of service is this troubling the passengers without providing any help to the leading consequences on the flight cancellation? I have to immediately book an alternative flight or else i need a full refund, as informed by the go air service asap!