I sent a payment for a course/service which I then disputed with the seller. He agreed to refund me but asked that I click the Confirm Receipt button on the transaction from my end (once it had been activated after 48 hours). He said once I had done that he would return the money to me. Should I do this or is it better to simply to raise a dispute? My concern is that if I click the Confirm Receipt it's preventing me from raising a dispute if he simply ignores me and doesn't send the money back.