Vodafone India — billing related

Address:

122011

I need to report overcharged billing issue for my vodafone postpaid number [protected]. I was travelling to beijing and for that purpose requested vodafone customer care to activate 149 and 1499 roaming packs on my number. Once i received the confirmation via sms that roaming packs are activated on my number, i started using mobile data which should have been charged at 39/mb. However on 2 instances i have been charged over 500/mb. Total overcharge is around 2200 for month of july. I have called customer care 6-7 times and chat as well. Everytime am given a complaint number and assurance that my billing issue would be resolved, yet it is still open. Don't know where to escalate and get it resolved.