Airtel
Increasing rates without any service msg!

I bought a 1 year plan from airtel. They told me that u will be charged rs 1.50 for std and 1 for local but after six moths they increased there rates. Now they r telling that u will be charged rs 2.56 for std and 1.50 for local. This is a pure cheating case. These company want more pr more customers. For this they cheat with customer like this. What should i do now? Advise smb!