Here's what I have done.
Visit
RTI Complaint & Appeal and file a complaint.
The text of my complaint is:
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I am a subsciber of MTNL Triband internet service.
I note that MTNL severely discriminates against its Mumbai subscribers by charging them very high rates as against the rates charged for Delhi customers.
One example is the unlimited use tariff which is Rs. 599/- for Delhi customers while it is Rs. 2500/- for Mumbai.
Besides this, Delhi customers are offered many schemes that are not available for Mumbai customers.
Please also note that BSNL offers excellent tariff for the rest of the country. So finally it is only the Mumbai customers that suffer this injustice.
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For Ministry Department, select Ministry of Communication & Information Technology.
For Department, select Department of Telecommunication.
For Organisation, select Telecom Regulatory Authority of India.
I had problems posting this complaint using Firefox or Chrome. It only worked with IE 7.
I suggest as many of us as possible should file similar complaints so TRAI will take notice. Let us hope we get some action.