refuse to give benefits as they told

Special offer!! Recharge kare 40, 60 ya 70 ke TOPUP se aur paye sabhi Local calls 30 paise mein poore 30 dino ke liye. Aaj hi recharge kare.
But they looted me.
They refused to give any benefits as they told me in message.
They have one number also to check the special offers and that is *121#
But they refused that this is not company number and not provide by Aircel company.
If these messages are not send by company then why they don’t stop these types of messages.
Please give me suggestion.