getting Chargeback in Paypal

so i have a website that i sell online services.
I clearly state in my terms and conditions that from the time you add funds in my website there is no refund. and refunds are not accepted blah blah

there is a guy who pays with different paypal email addresses and continues to charge back all the time

i provide paypal with proof

is there anyway he could win the case? even once?

do you suggest anything to do or update my terms and conditions?

getting Chargeback in Paypal