Airtel — every time I call a 1860 number from my number not connecting

Address:

Nagpur, Maharashtra, 440022

This is getting ridiculous. Every time i call a 1860 number from my number [protected] i keep getting a few beeps and the call gets disconnected. The issue persists over multiple handsets. On calling the customer care the standard response is that it will be resolved in 48 hours or that it will work after restarting the phone which hasn't worked. Not great customer service. If a resolution is not provided i will be forced to change subscribers.