micromax a102 dead after wrong flashing

i have recived phone in completely working condition. ploblem is set working slow. its hw aw1800f-v1.0, sw v8-1-c.
by mistake i have flashed this set with v8-1-9 and now set power off after micromax logo. now ihave tried with same firmware 8-1-c but set is in same condition.
Phone’s preloader is ohk n tried formating in infinity n reflashed with sptool n infinity box to.nothing happend