Airtel — Unable to use International Roaming on my number

Unable to use my International roaming plan on my airtel number. I'm currently in Phillipines and my number is of India. Neither the calls are working nor the internet. For the past 3 days I'm contacting to customer service, applied each and every step they told but nothing solved the issue. I have paid 899 rupees and when I asked for my refund they were saying it's not possible. What a spam!