Dewan Housing Finance Corporation [DHFL] — increase in roi every two months

Address:

Mumbai City, Maharashtra, 401107

I took a loan in June 2017 @8.7% and now within 1.5 years they keep on inreasing in every two months and now stands at 9.57%.
This is so ridiculous and i think i am trapped. Every other bank is still providing the home loan @8.5% how can they be not regulated?

My loan account is 00002310 and please tell if this can be reduced or else how to shift it to other bank.