How do I reset serviceA indicator. Oil has been changed after 0% life left

Did you do both of the procedures listed? With the ignition key on, but engine not running? Holding the reset knob for 10 seconds until maintenance items blink? Release for a second, Followed by holding the same knob for another 5 seconds until the items disappear, and oil life returns to 100%?

Too hard to explain here via this forum. Best to visit a local shop who can help you with this first hand with no trouble.