You've left the same feedback for the last 3 sellers, easy to make a mistake this way when using a phone.
If you haven't received your item do not worry about any positive feedback left, it's not taken into consideration as it can be left in error, as you have found.
Just proceed this way:
Then, if the seller is not being helpful, go right of the item purchased, and from More Actions select.... I Have Not Received My Item.
If you are not fully refunded within 3 days, you must escalate the case on day 4 or within 30 days from opening the case, and eBay will step in and force the refund.
Do not close the case early for any excuse or promise the seller may give, and do not forget to escalate.
@dunzai