what happenned to my 2000 lx 470 suspensions? The suv suddenly came down low. on 2000 Lexus LX470

i had wanted to adjust its height and had pressed the height button from neutral to low. now it refuses to return to its former height, it drives terribly as it now bounces uncontrolably as you hit any bump and the "off'sign for the height control switch refuses to go off as it keeps blinking.

Asked by for the 2000 Lexus LX470