Minecraft donation chargeback?

So i joined this pixelmon server & i donated a total of $37 Two payments one for $30 and another for $7 i paid through paypal( which is linked to my bank account) & i always have money in it around $100 to spare. So i donated right after i got what i paid for which was
CoolTrainer
$15.00
CoolTrainer Prefix [CoolTrainer](LightGreen)
- 64 Gold Ingot
- $15,000 Cash
- /Kit: Cool
- Anyone One 1st Evolution Pokemon (Can't be Legendary)
- Flashing rainbow leather armor (/da toggle)
- 1 Lucky Egg
- 1 Moon Stone
I got that & 20K PokeCash & a EXP Share.
So then i decide i want fly so i buy it
/Fly for $5
And make a pokemon shiny for $2 thus my total at $37 well i got all i paid for on friday, except for one thing the Spawn Donator House
$4.00 The owner said he would get on that by the weekend ( he never did.)
So i didn't mind waiting a bit you know When i talked my name was {cooltrainer}_____ and i was happy when i did /fly i could fly i had gotten my shiny. Until today Monday when i log onto the server My cooltrainer title is gone & my shiny pokemon i can't do /fly anymore says i need permission. The owner is on but when i chat him he won't reply, Now you must be like well maybe the payment didn't go through well it did the money was taken from my bank account all $37 & i'm stuck without my titles & shiny pokemon. Normally i wouldn't care $37 isn't much but why should i give it away for free? So i want to issue a chargeback How do i approach this situation?