Many of those defrauded, including Mr Gledhill, found support in a WhatsApp group for his victims.
And at least a dozen of them got advice in free zoom seminars hosted by financial fraud investigator Richard Emery – sessions which helped many of them get refunds.
Mr Emery told the BBC a financial code in place at the time means many got their money back from their banks.
“The starting point for the CRM code is the bank has to reimburse,” he said.
“[It applies] when somebody pays money for what they believed was a legitimate purpose, but which turns out to be fraudulent.
“The victim does not have to prove the bank did anything wrong,” he added.
And he says that anyone defrauded by Killick may even now be able to claim a refund.
“That’s even if you claimed in the past and your bank rejected you because they claimed it was not fraud.”
Mr Emery says he provided advice for free because of his Christian faith.
He says, “As it says it various places in the Bible, faith without works is a bit useless.”