Airtel
Sms pack which was included while giving the post paid service was withdrawn without information

I was provided with a post paid connection airtel cug sbi connection which had a sms pack at a pre told rate but later the pack was deactivated by the company without prior intimation and the amount was also deducted and billed in my monthly bill... i called the customer care a no of times but all in vain..i wish to seek d explanation from the company as to why the refund is not made into my account...