It's an interesting airline to deal with via email.
I asked, on 6th March, for a full refund due to the schedule change.  I  pointed out that there should be no cancellation fee because the fare  conditions stated that the fee would be waived if there was a schedule  change.
They  said "no" on 11th March.  And explained why in another email on that  day.   It needs to be a "significant" schedule change they said and they  pointed out the the Conditions of Carriage clauses that supported that.    They also asked  if I'd still like to cancel.  I didn't reply.
Today, 14th March, I received another email, directly replying to my email from 6th March:
"Your  request has being duly received and is in the refund process.  Please  kindly note that the respective amount will be credited back to your  credit card which was used to purchase the ticket within 14 working  days."
Goodness knows what it will the refund will  be!