Refund issue

smartshopper80

I posted it before, and PayPal ruled in the seller's favour as these outsourced CS could not deal with issues llike this, so it's easier for them to let the retailer win.

Long story short. I returned an item to a retailer due to fit issue, and their courier seemingly lost the parcel and denied the refund, saying that they never received the parcel. Of course they never receive it as the parcel's become unable to be located after a series of logistic issues. I made a claim with PayPal before going with chargeback(which I haven't done yet). PayPal only has two categories for disputes: one is 'not as describled/faulty', and another is 'item not received/fraud'. And they ruled in the retailer's favour coz my case scenario doesn't fit into these two. So, I have this query, and I'm asking if I think of this corrcetly:

The seller only provides one return method, and the customers are not allowed to return the goods using choice of their own. Now the seller's designated courier lost the parcel, can this situation fit to the above-mentioned categories? I mean, both delivery and return can be deemed as 'a part of the product'. A product is not necessiarily a physical one; service is one too. Being given only one return option by the seller, and they can't bear the loss of the delivery, can this been seen as an incompleted service?

In that case can I use this to argue with PayPal? I'm appealing the case.

Thanks for reading. English isn't my mother tongue, and I hope you understand what I meant.