Mortgage request for information about Adjustable rate?

We bought a house in december 2006 with adjustable rate, we plan to refinance between parade and april because we are planning to use our tax return to pay our credit card debit so that our FICO score can be increase so that we can take lead of the current mortgage interest rate. But today we receive a mail that stated that our monthly payment have been increased from 7.7% to 10%, which make our monthly money from $1500 to $1800, that is $300 increment need suggestion on what to do, how to communicate with the bank so that the latest increase will be freeze for the next 3 month. please help and no information is too much. Thanks
"> If the increase is per the expressions of your loan, there is no way you can "freeze" it.


Related Questions:
When ancestors switched to the low fixed rates mortgages rear legs contained by 2001-2003..did most achieve constrained time ones ?
or permanant ones?? why so would ANYONE want to get only a constrained period of time low fix rate mortgage instead of the permanant one?? why so?? Thanks for your answers!...