Education loan interest subsidy

I had taken education loan from SBI in 2010 and is eligible for the interest subsidy plan by govt. My mortorium period ended in august 2014. But bank had not claimed for any interest subsidy during that period. Inspite that they keep on adding that interest in my principle amount and made my EMI accordingly. When asked about the benefit they always told me that it is not yet come from govt and will automatically get credited in my account. After paying increased EMI for around 1 year i stopped paying as bank was not reducing my EMI nor getting my subsidy.it's been 1 year since i didn't paid any amount. When i enquire now also they still say the same that it is yet to be disbursed. How can we resolve this situation.