I received an email from Cayenne that told me the setup is complete. The data from my device is received in TTN application but Cayenne dashboard always says it is waiting for data.
it looks like you have selected acklio network server while adding the device. Remove the device from the dashboard, you will have to wait for 1 hour atleast before adding it again. To add the device, go to lora devices and first select TTN network and then search for the device.