Delhivery — Package delayed and rescheduled without my knowledge

I placed an order on 18th October and the expected date of arrival was 25th. Package showed Out for Delivery early on 23rd, so I promptly rescheduled it for the next day as I was not available on 23rd. On 24th, 25th and 26th October, they kept canceling and rescheduling my delivery saying the customer wasn't available when they did not even once call or reach my place. Its been more than 3 days and their customer support contact number also does not work or is made not accessible to consumers, making it impossible to reach them or lodge our complaints.

Package has been delayed and rescheduled without even my knowledge or consent twice now.