How to chargeback

I recently got scammed with elo boost with the booster using scripts and being on 17lp after a week of playing. Since Sunday I tried contacting if he will boost ah he never played since Saturday, but with no response.
What do I say in a chargeback application on Paypal?
Anyone got experiance with this type of thing?

Yes it's quite simple follow the next steps:
1. Login to your PayPal account.
2. Go to Resolution Center.
3. On report a problem select: Unauthorized Transaction.
4. Type your reason.
5. Wait until they will ask you few questions and bam your money are back if you know to give them the right answers :D.

Enjoy.