Airtel — Customer Care Executives making my outing barred & reducing my balance in phone

Sir,

Please feel the anguish i am having.I had an offer from Airtel giving 10 days free Hello Tune.I had called Customer Care before the expiry period of that offer & it was deactivated sucessfully.The next day i get a sms saying thanks for continuing with Hello Tunes & you will be charged Rs 30/ Month.I called tthe customer care executive to enquire whether i have been charged(executive did'nt answer for it) if i have beeen charged i want it refunded & then they are saying since you didnt get sms telling that your hello tune has been deactivated you will be charged.Then when i cleared that it not my mistake but companys mistake for not sending sms then they promised me for refunding.Then again i called customer care for enquiring about my balance & was happy to know that i have not been charged & thanked executive for giving me the information.Then i got the greatest shock when i got charged for calling customer care Rs 15, when that is absolutely free.And my balance which had been Rs 32 before calling customer care is now showing negative balance.Now when i am calling Customer Care my call is not being connected to customer care executive nor can i send my complain through sms.Also my outgoing calls & outgoing sms has been barred.While i can call customer care through other mobile no.they are also attending their calls (which my friend already called for me).
Sir can this be called as Customer Care Centre or Customer Suffering Centre.
Its really like they are taking revenge on me.I know its hardly a matter of 40 or 50 rupees but do you think they can act in such a cruel & mean way to a cutomer.

I seek your support & help.Also from all the viewers who are reading this.

I am writing such a complaint 1st time in my life so just ignore if i have written some harsh words

Hoping something will happen soon.

With Warm Regards
Ninu