Lenovo a3300hv software problem

I had a lenovo a3300hv tab. It has a software complaint.. So i flashed it with sp flash tool and then i came to know the imei has wiped. Finally i restore the imei with mtk droid tool and rooted the device. After that i got a sysstem update alert and i accidently done that.. After that that updated software cant be installed and now my tablet is in boot loop showing only logo and straightly going into recovery mode. What could i do now. Plz help me