[mothered]

The idea was to be the buyer and seller myself

Your Idea Is a good approach, but It Is somewhat complex and Involves a number of steps to complete the entire process.

Off the top of my head, here's one way I see It working: 

1. The buyer purchases the service/gig.
2. The money Is put on hold awaiting the seller to complete the order.
3. The seller fulfills his end of the deal.
4. The buyer receives the service/gig, and the seller receives his payment.
5. The buyer (yourself) files a dispute through PayPal or a chargeback via his CC provider and succeeds.
6. The seller (yourself) contacts "Fiverr's Seller Protection" claiming the service (to the buyer) was provided In full.
7. Fiverr agrees and reimburses the funds Into the seller's account.

All In all, the buyer (yourself) has received his cash through PayPal/chargeback, and the seller's account (yours) has been credited through Fiverr's Seller Protection. Essentially, you've doubled your money - the transaction (and chargebacks) between the seller & buyer Is the same person - yourself.