Ok; I have now spoken to Mike at length on this and he accepts where there may have been issues but also feels he has tried hard to resolve any of the issues. The current position, as can be seen from your latest screenshot, is that the keypad parcel is with UPS in Madrid. Mike advises me he has requested that you provide them with the information too that he has provided to you and them with the details from the invoice regarding the contents of the parcel, what it actually is, the tariff code and that it is a replacement part.
Mike has also advised me that the Paypal refund request has been rejected by Paypal as it's outside their protection period.
So, the practical choices to you are:
1. If you have any outstanding correspondence from UPS please respond so that the delivery can be completed.
2. If you wish to have a refund the goods should be returned (inc. the keypad). I have explained that although that you already have the turntable and motor that the three elements constitute the product and that your consumer protection would give you the right to return the item within 14 days of receipt of the complete order. That would have to be at your cost under current legislation - https://www.which.co.uk/consumer-rights/regulation/consumer-rights-act-aKJYx8n5KiSl - under your return rights (unless the goods were faulty - which they won't be if the errant keypad is united with the rest of it). The refund would then be issued when the goods are received back, this is standard practice with any retailer.
I'm still unsure why I've been leant upon to get involved with this; it's not my doing and I don't have any magical spell to cast upon customer disputes (I have no rights in this technically, only you and the seller do) but that's all I can realistically do - and that is to clarify what your options are after discussion with the seller.