Question RWatch M26 firmware

I have a RWATCH M26 and thinking it was internally equal to Elegance U8, installed the U8 firmware in order to have the language in Portuguese. Now the capacitive buttons are exchanged and all touch screen works in reverse.

Does anyone have the firmware for the M26 or can help me find it? I've contacted the seller, but has not

excuse my english

thank you
Phone: Google Nexus 5
Tablet: Google Nexus 7