From what I can gather.
Qwila lease the aircraft from an owner. The owner is apparently in default with the bank and the bank have demanded the return of the aircraft from the owner.
The Bank are willing to lease the aircraft to Qwila but there seems, as always, to be a legal despuite as to if this is possible, as the owner believes that he must have the aircraft in South Africa to comply with the Banks order.
Because of this he got an order against Qwila forcing them to return the aircraft.
As this has apparently been goining on for some time, Qwila apparently have replacement aircraft.