Welcome Rashmi,
I think it is a good idea to shorten your duration between transfusions until you begin catching up. I would suggest maintaining your hemoglobin at 9.5 or above.
Constant chelation will lower your iron levels, you may not see the results immediately but with patient, and the right dose you will get the results that you seek.
As Andy says, it would help us all to know more about your circumstances.
Best,
Sharmin