Hi Sir. File now here: https://www.saroms.co.za/product/itel-a52s-lite-firmware-rom-or-flash-file-non-stock/
The file on hand is none stock and refuses to flash on the SP Flash Tool. If you have tools like Inferno or Miracle, then you could try it. The aim should be to flash only the system/Android file. More instructions to be included. Do let me know via email or by adding a comment below.