Kang Vip b211 to kangvip b029 downgrade later phone has been soft brick?

Hi. Huawei p8 max dav703-l phone owner. Phone is using kang vip b211. Downgrade to kang vip b029 phone is now Huawei Logo stuck. No opening. Please help?

from xda-developers http://ift.tt/2bVgt3q
via IFTTT