It started in Aug 2019.
The Airtel customer care executive suggested switching to a combo plan where my primary mobile number can be clubbed with other number and a Data Card number at Rs. 749/- monthly tariff which I agreed to.
To my surprise, the bill was generated with the new tariff without combining all 3 subscriber numbers and I received 3 separate invoices for all 3 numbers!!
After 2 months follow-up, they finally could club one number but the data-card continued on separate billing in addition to the combo bill. So, effectively I was paying double for my data-card subscription.
Eventually, in June 2020 I discontinued the services for Data-card.
There is no responsible reply to my complaint and harassment I experienced for alomost a year.