Airtel — package not working in roaming

Address: Chittoor, Andhra Pradesh, 517644

Hi sir,
Recently i recharged my mobile with rs 399 package with unlimited out going and 78 gb 4g. When i am on roaming it is not working. Again i have to recharge. It is really no meaning. Having ad one india one network when i leave state net work not working is really cheating. It is not mentioned any where when we recharge the offers which doesn't work in roaming. Just see other network jio it works all over india. Airtel should clearly mention about package other wise it become vheaying