Airtel Company — I'm complaining about balance deducted from my airtel sim

Address:

795128

I have recharge my airtel sim with full talk time Rs 100. After 2 days the company deducted Rs 20 without any proper reason by sending me a simple message saying that THANKS FOR USING VALUEPACK, YOU HAVE BEEN CHARGED FOR RS 20 FROM YOUR AIRTEL MOBILE ACCOUNT. I called the customer care 155223, they simply said YOU HAVE NO VALUE ADDED SERVICE. If so why did they simply deduct that amount without any reason... They must refund the amount at the earliest.