Paypal can dispute because i usualy use VirWox. I will use your service if it have good feedback.
Everyone can use exchanges like VirWox for buying Bitcoins with PayPal/Credit card or even debit card.
They provide very flexible way to buy bitcoins.
VirWox is very, very expensive! I sent $100 from PayPal to VirWox, then to my bitcoin wallet. My $100 ended up being $65 worth of bitcoin.