Southern Railway — parking contractor charging more

Dear sir,
The railway parking in tambaram east has charging more for two wheeler parking. When we ask they are answaring to ask to railways. They are telling the railways only increasing the charges currently.
They are charging rs. 15 for non tokan parties and rs 400 per month for monthly pass.
And also when we ask for the order for increasing the fee, they are not ready to show the same. We are expecting your action on this case.