Idea Cellular — Billing discrepancy

Address:

Hyderabad, Andhra Pradesh, 500195

I have a corporate account of idea with 5 phone numbers bearing one account number and 1phone number bearing another account number. all numbers are active under CUG since last 4 years. on 15th january 2016, i had applied for a plan change for 3 numbers to be migrated to easy share 900 plan. i was told that 1 number will be charged ₹900 monthly rental and other 2 numbers will be charged ₹99 monthly rental. i had met Ms. Hemalatha at idea head office, Khan Latif Khan estate, near LB stadium, Hyderabad. i submitted a letter head of my company for the plan change request. i was told that since there are 2 different account numbers, i will take 2 days time. it took 3 days for the plan change. when i received the next month bill, i was charged 900+99 = 999 rental on all the three phone numbers. when contaced idea customer care by email (communication id: C1-[protected].) i did not receive any solution. i visited idea head office and contacted Ms. Hemalatha again and she promised solution within 3 days, its been over a month today but no response. i tried to contact Ms. Jeevan Latha
Field Service- Zone 12 on her number, but she also asking for time.

there has been no proper response from idea on this matter and my bill remains pending since then.

please help.