help - lost hearing in left ear

[snowman]

I was diving to a depth of 4 metres (only)
and coming back up within 45 seconds on each dive
(no scuba gear) just in a swimming pool
then I jumped in off a high diving board
I landed funny on the left side of my body
smacked my face\ear and left shoulder \ chest into the water from quite a high height
anyway
besides the fact that it hurt
my left ear now doesnt work
cant hear anything
I waited for it to fix itself but nothing happened, still cant hear from my left ear and I have loud Tinnitus in my left ear only
What shall I do
any cures?