REGARDING GSTR 9 TAX LIABILITY

Shoeb Hasan (81 Points)

18 June 2019  
Dear sir,
Two of my suppliers didn't file gstr-1 for the period of August, 2017 and January-february 2017 respectively however they filed Gstr-3b for that particular periods.
But i have already claimed the itc through gstr-3b.
now my gstr-2a showing lesser itc than i claimed.
So now i am going to file gstr-9, So what should i do to avoid tax liability, what options i have, if i ask them to file GSTR-1 now, will it help?
because it is not my fault
please help
thank you