State Bank Of India [SBI] — house loan interest rate issue

Address: Yamuna Nagar, Haryana

I m writing this on behalf of my mother.in 2009 she took house loan with floating interest rate from your bank. That time the interest rate was 8.25%. Since 2009 the interest rate has fallen constantly but the bank has just increased our interest rate from 8.25% to 12.50%. This interest rate is even vry high for the personal loan but ours is the house loan. The present interest rate has fallen down to 8.5% but still we r paying 12.50% interest rate.
This is vry serious matter. We brought this information in notice of loan manager too. But he has done nothing. The bank employees just trouble the customers. Account no is [protected], sbi, jagadhri. Code is 00654.
Please consider our problem. We are hoping for the help
Thanks
Ankita
My no [protected].