Official Wiko Rainbow 3g Stock Rom For Sp-flashtool -

This procedure will wipe all your data. Back up your photos and contacts first if the phone still boots.

Custom recoveries cannot flash stock SP ROMs because they lack the scatter format. You must use SP-Flashtool. Official Wiko Rainbow 3G Stock Rom For SP-Flashtool

What is your specific (Rainbow, Rainbow Jam, Rainbow UP)? This procedure will wipe all your data