Paypal pushing case end dates, worried I'll get scammed

So I "bought" some things worth 580 off someone on Facebook, it came out that that person is a scammer. So, since I paid with paypal's g&s, I opened a case for both payments (230 and 350). But something I noticed is that the day I'm supposed to get a resolution/the day the case would end, it kept getting pushed from June 5th to June 8th then the 10th and was supposed to end again today on the 15th but once again, it was pushed to June 20th. I'm getting frustrated and worried because customer service has been no help whatsoever other than saying that cases need 14-30 days and they'll email me. But no one is telling me why they've been pushing the date again and again. I'm worried that I'll be scammed out of 580$ because paypal isn't helping at all. What should I do? I've added all the screenshots to show that the person is a scammer and that I didn't receive anything. I opened the case on May 16 so we're reaching over the 30 day mark if it's gonna end June 20th (big emphasis on the IF this ever ends).