Rotate screen GPIO

[lukasoderso]

Hey Guys,
so i made a console with a pi 02w and a waveshare 2.8inch dpi lcd, but the image is vertical. i tried rotating in the config.txt with a dtoverlay rotate thingy but it didnt work unlike said in the tutorial. Can zou please help me? oh and also probably good to mension im a complete beginner so ii didnt try it all.
thanks in advance!