Airtel — postpaid airtel wifi

Address:

411035

My airtel wifi no is [protected] i upgrade my plan from 999 to 550 before 5 months customer executive told me this plan for 6 months for 4 billing cycles there is no problem
In august at they upgrad my plan by there side to 999
I complaint on 17 aug customer care they told me that plan upgrad by me but i am not doing there is no logic because i have use of only 10 to 12 gb and already 70 gb data pending she told me that i cant help on such situation
Its ok. I can pay 550 extra without my mistake but airtel loose his customer who is stand with airtel from 18 months