The product description in the ebay link above and in turn the “mhs35” overlay is most probably wrong for your screen.
Execute:
sudo rm /boot/overlays/mhs35-overlay.dtbo
sudo rm /etc/X11/xorg.conf.d/99-calibration.conf
sudo rm /usr/share/X11/xorg.conf.d/99-fbturbo.conf
sudo curl -L https://github.com/goodtft/LCD-show/raw/master/usr/tft35a-overlay.dtb -o /boot/overlays/tft35a.dtbo
sudo curl -L https://raw.githubusercontent.com/goodtft/LCD-show/master/usr/99-calibration.conf-35-0 -o /etc/X11/xorg.conf.d/99-calibration.conf
sudo curl -L https://raw.githubusercontent.com/goodtft/LCD-show/master/usr/99-fbturbo.conf -o /usr/share/X11/xorg.conf.d/99-fbturbo.conf
sudo sed 's/"fbturbo"/"fbdev"/' -i /usr/share/X11/xorg.conf.d/99-fbturbo.conf
sudo sed 's/mhs35/tft35a/' -i /boot/userconfig.txt
Then reboot.