Airtel — not giving data as per offer

Hello sir, airtel offer volte service in assam. As per offer who activat this service they will get 10gb at first. They activated this service in my mobile no but they not provided me 10 gb. As well as not inform me through sms. Now i have problem in calling and received calls. When i call 121 they tell me that i have to received sms from airtel. But i have not. Please look this matter and provied me my 10gb data. Mobile no-[protected]. I have also mail them but noreply from them. If i port to other network i have lost 630 inr. Witch is in my account. Thank you...