Steve Komphela's men were meant to host Volcan at Durban's Moses Mabhida Stadium on February 27, but the Comoros-based visitors failed to pitch.
Amakhosi subsequently decided to reimburse supporters that bought tickets for the preliminary round tie.
Chiefs on Thursday released a statement on their website, which said: "The refund process for the cancelled CAF Champions League match between Kaizer Chiefs and Volcan Club de Moroni will end at the close of business on Monday, 25 April 2016.
"Comoros-based Volcan de Moroni failed to pitch for the Champions League’s second leg fixture at Durban’s Moses Mabhida Stadium on Saturday, 27 February 2016. Even when the match was postponed until the following day, the Comorians didn’t arrive. As a result, Chiefs were handed a walkover win.
"Supporters that bought tickets for the match were earlier advised to use their valid ticket stubs to seek a refund at the Computicket and Shoprite/Checkers. Anybody who hasn’t done this as yet, please be advised that Monday, 25 April 2016, is the last day to do so."