Repair for Firewire in FST construction

Hi, I dented my Evo surfboard on a Kenyan reef the other day (see pic below). Unfortunately, the board got water in the whole.
There are apparently no professional surfboard repairs in country and the local kitesurfing schools do not have the ability to fix it. I am keen to get back on the water quickly.
Any suggestions as to how to get it repaired? I have never done a surfboard repair so I am at a bit of a loss. How do i drain and fill the whole? Do I then need to put Epoxy on it and around the fin box?
Thanks a million in advance!
There are apparently no professional surfboard repairs in country and the local kitesurfing schools do not have the ability to fix it. I am keen to get back on the water quickly.
Any suggestions as to how to get it repaired? I have never done a surfboard repair so I am at a bit of a loss. How do i drain and fill the whole? Do I then need to put Epoxy on it and around the fin box?
Thanks a million in advance!