OK now lets go to how to use WiseLinkTool to flash .sca format
Download and install MTK USB VCOM drivers from here or here or here
Extract, install and launch by opening WiseLinkTool.exe inside installation folder
Click on Open RegCode File Navigate and select ZZZZZZZZZZZZZZZZZZZZZZZZ.key from extract folder
Now Click on the button with … to load .sca format
Navigate and select the scatter file of the device you want to flash/unbrick or upgrade.
Tick the required partition to flash (Tick all for complete flash or upgrade
Congrats! you have successfully flashed your device