... and after cutting resistors and connecting MOSI to SPA you tell me the I2C address please.
... or is it MISO ? or maybe MOSI and MISO together to SPA.
ok, I will add something here:
in fact there are oled displays available on the market which provide both protocols to choose with jumpers or solder points. This is not converting this is choosing between two separate options. The oled which @memre8 shows on his foto is NOT convertable.