Airtel — using message card but charged amount by airtel

Address:

Jaipur, Rajasthan

sir/madam,

i am a customer of airtel last 3 yr..
i am using airtel 44 message card voucher
but airtel charged 10 rs. from my account
4 std msg and 4 local msg
4 std msg per msg 1.5 rs
4 local msg 1 rs
when i complained to airtel care then they told me, after 24 hrs my amount will be credited on my account.
but...
so plz help me

ANKIT BANSAL
[protected]