VIVO Y21l Dead By wrong flash step my own mistake in hurry please help

Please Experts extremely sorry for disturb . i have vivo Y21l working charm n perfect from last 4 years . just 4 days before phone hang n menu not open i try to reset failed . then flash with Qfil tool with 3.2gb file download from net . after that imei loss and display lining and blinking . then got lots of files in this forum . but im facing issue whn i try to download files from googledrive its always stuck n stop near to 80% or 95% . then by mistake i connect inferno dongle and write MBN file as a Full DUMP . now phone totally DEAD only Qualcomm port shows . flashing not started with Qfil tool also . not going in fastboot or recovery mode . not even vibrate now . please suggest Solution for this phone now .