First open up the client/main.lua in esx_ambulancejob folder and find this:
if FirstSpawn then
exports.spawnmanager:setAutoSpawn(false) -- disable respawn
FirstSpawn = false
ESX.TriggerServerCallback('esx_ambulancejob:getDeathStatus', function(isDead)
if isDead and Config.AntiCombatLog then
while not PlayerLoaded do
Citizen.Wait(1000)
end
ESX.ShowNotification(_U('combatlog_message'))
RemoveItemsAfterRPDeath()
end
end)
end
end)
and replace with this:
if firstSpawn then
firstSpawn = false
if Config.AntiCombatLog then
while not PlayerLoaded do
Citizen.Wait(5000)
end
ESX.TriggerServerCallback('esx_ambulancejob:getDeathStatus', function(shouldDie)
if shouldDie then
Citizen.Wait(10000)
SetEntityHealth(PlayerPedId(), 0)
end
end)
end
end
end)
When the player spawns in it will take a couple of seconds so that the player skin loads and will then kill them.
I hope this helps out people who have been looking on how to stop people combat logging 
OR if you find it easier you can go to my GitHub and download the whole script there.