This Time? Just AWFUL

I bought a waterproof sun shade sail from eBay. The eBay seller was SHAOMEI (bigwholesale4u). When I wanted to pay, the first I saw that paying with PayPal was ticked. Therefore, I paid with PayPal. In hindsight, this was a grave mistake! PayPal advised on 27 Feb 2019 that the tracking number was WO ********** ********** AU. Tracking number P8M ********** ********** 0300 was stated as CANCELLED. By email dated 27 Feb 2019 received at 12:29 pm, eBay advised that "your order is on its way! It would be sent to [my address], Australia. Estimated delivery: Tue, 05 Mar - Wed, 06 Mar ". I had escalated this dispute to a claim on 9 March 2019, that is after 3-4 days after the estimated arrival, because, according to Australia Post, tracking number WO ********** ********** AU provided by PayPal was invalid. By email dated 13/03/2019 received at 4:57 pm, eBay advised 7-8 days after the estimated delivery date that the seller has provided the postage information for your item. The tracking number was P8M ********** ********** 0300, the same number PayPal had stated as CANCELLED on 27 Feb 2019. It was clearly PayPal's mistake by providing me with the false tracking number WO ********** ********** AU, when the tracking number should have been P8M ********** ********** 0300, which was stated as CANCELLED. By email dated 15 March 2019 received at 12:04 pm, Australia Post advised that "Your item P8M ********** ********** 0300 is due for delivery today". I received my order on 15 March 2019. That was 10 days after the first estimated day of arrival being 05 March 2019. I requested from the seller and/or eBay and/or PayPal a partial refund of AU$ 10.00 as compensation for having to write to eBay to lodge a dispute and to complain that the tracking number was invalid, to PayPal to escalate my dispute to a claim and repeatedly writing to their message centre and to Australia Post to resend the parcel to my address. By email dated 20 March 2019, PayPal advised that my case for refund had been refused, although I had only asked for a partial refund of AU$ 10.00. The reason for PayPal’s refusal was that this “decision was made because we received shipment tracking from the merchant confirming that the merchandise was delivered”. PayPal ignored the fact that my order was delivered only on 15 March 2019, that was 9 to 10 days after the estimated delivery date. PayPal ignored the fact that tracking number WO ********** ********** AU – provided by PayPal - was invalid. PayPal ignored the fact that P8M ********** ********** 0300 they themselves stated the tracking number as CANCELLED.