Which station staff ? If it a Farringdon there may have been LUL staff who couldn't advise.
It is inconceivable that Govia would operate through a station where either they did not have staff or arrangements were not in place for the company that does operate that station to contact Govia in situations like this.
So why did the LUL staff not call for the Govia staff to help the customer or pick up the phone to speak to Govia to establish how the customer could be helped.
Perhaps a complaint is in order so the relevant LUL staff undergo refresher training.