ICICI is the biggest cheat and it was the worst experience i ever had when i came across a special scheme for existing customers

I took a Home loan in 2004 with 7% interest rate within 2 years they immedialty increased the rate of interest to 13 % .. in 1st week of April i came to know from some internet forum that they launched a scheme where i can convert my exsting loan to 9.75% with 0.5% penalty. I contacted customer care and they denied about such scheme, i mailed to ICICI from my online account, but no answer received till now. when i visited the branch (only Home Finance Branch) they accepted such scheme and told me that it is just for walk in customer and the charge is 1.75 % + Service Tax, i had a good fight with them and told them that i was not informed and even when i tried Customer Care and Mail. I told them to consider my case special and offer me 0.5 % rate which was there in March. the local team sent the request to somewhere Mumbai and after two days denied saying it is not approved and you have to pay as per current policy. just the plain answer and no reason. I asked for the contact no of the approving authority so that i can speak to him but they did not pass saying they dont have such permission.

This is a sheer case of fraud and lack of transperency in India's Largest Private Sector bank they are in service industry and looting customers and most worryin part is RBI or Indian Gov. has no control on the same. they are now unnecessarily chraging me 19K where as they were charging 5K just 2 weeks back.
i am helpless where should i go !

I really dont understand the meaning of Floating Rate,

Can anybody give me the process to take them in court, i have all the proofs