call barred

My mobil number is 7209706101.
It is of uninor.
I cant call tollfree numbers like 18004253800,18001112211,1800180222,18003001947
..
Whenever i try…a message sounds -Your call cannot be peocessed . Please try later.
This posses difficulties as i cant call any customer services.
I cant call to know my bank account balance.
Please do something