This will allow you to root your VDF-300 by pushing the SuperSU.zip. The TWRP is flashable via the SP Flash Tool (Scatter file included). Below an SP Flash Tool based flashing tutorial
- Obtain the TWRP custom recovery file from here: http://roms.satechhelp.co.za/product/vodafone-smart-mini-7-twrp-custom-recovery-vdf300/ - download and extract the file
- Install the MediaTek USB Vcom drivers
- Download and launch the SP Flash Tool
- Click scatter loading
- Browse to and select the scatter *.txt file in the extracted folder
- Click Download
- Connect the VDF-300 while off
- You get 'Download OK'
- Disconnect and boot into recovery or normally.