1.8 tft 128*160 lcd error

is the link which we have bought.

#define ST7735_GREENTAB
This almost fills the display but doesnt clear the previous display.

C:\Users\ ... \Documents\Arduino\libraries\TFT_eSPI\examples\320 x 240\Read_ID_bitbash
doing this example gives nothing on the display
but did C:\Users\ ... \Documents\Arduino\libraries\TFT_eSPI\examples\320 x 240\TFT_Rainbow
this example displayed fully on the screen but it doesnt clear the previous content on the screeen