Eventually answered, when I selected option 7, after a long ring time (new driver applications). Got an apology from the staffer.
Had a non payer, app automatically advised to enter a fare of €3.80 minimum fare even though it was 3am. I did so, and sent an explanatory "help" message. I was suspended without explanation, until midnight, when I switched on the app at 8pm the next shift. Staffer said that apparently €5.80 is the minmum fare entry now, and I would not have been auto suspended if I had entered that amount, He couldn't explain the app advising and accepting €3.80.