Airtel — telephone bill overcharging

Address:

Chennai, Tamil Nadu

Respected Sir,
This is aarish and the complaint is in regard to my landline number[protected] ,which has been registered in the name of my dad (S.Ramesh). Actually ,we have a total outstanding bill amount of Rs.3000(app) from the month january until now.But we feel that we have been overcharged for the landline usage since we have'nt used the phone to that extent. So,kindly check out the credibility of our bill amount for the months as stated above.
Another issue which i wish to bring to your notice is that i haven't been briefed with a novel way of blocking the outgoing calls of my landline phone. The methods suggested by your customer care officials were tried by me but it is not coming into effect.So,kindly,acknowledge me with the correct way to block the outgoing calls of my phone. Thank you,

with regards,
R.Aarish.