Airtel — abcd

I am using Airtel network([protected]) for last 7years. Last week i got an offer of Rs399 Pack which gives unlimited call+1gb/day data for 84days. When i checked this offer in my mobile there's an option to activate the pack with main balance. So i recharged my number for main balance of Rs.405. When i activated that pack it shows your pack is booked for 72hours. But actually it didn't activated even i had the main balance of Rs.405. So i had decided to contact Airtel customer service. But they said you can't activate that pack with your main balance. So why does it show an option to activate the pack with my main balance. They have to mention it clearly whether you can or can't. They coolly said recharge that pack directly, when i had already invest Rs.400 for this pack. Ok, there's an another pack of Rs.199 for 28days. I decided to activate atleast this pack. It also had same problem but there's an option to activate. They said you can't activate both the packs with main balance. Please go for direct recharge. After all this problem again i tried to activate Rs.399 & Rs.199 with the main balance for my luck. But got the same result. Midnight i got another offer of Rs.149. As usual again i went for that Rs.149 Pack because I had to use my main balance. The result is same. But after 5min i received the confirmation message for activation of Rs.149 Pack. So i was happy to see that. But when i checked my main balance i got to know that i had only Rs.56 out of Rs.405. So again i called to customer service, they told that you have activated two packs of Rs.199 & Rs.149. That day was really terrible for me. There is no confirmation message for Rs.199 pack activation and also the pack which can't activate from main balance already they said. Now i lost Rs.149 in this problem because of Airtel's poor support regards recharge offers. I tried everything to claim the balance, but there's no use. Please help me in this problem. My Number is [protected], Airtel network.