I have a huawei p30 lite software issue

I have a huawei p30 lite that went off after I tried to downgrade the software cause, it failed to do a software upgrade so I used hisuites to downgrade it and the software loaded from 1% to 99% then the phone just went off, the phones battery was at 70% and I tried charging it up again but it is not showing any signs of life, how can this issue be solved?