Did you receive your parcel eventually ?
I've currently got one that's evidently stuck in the black hole. It's coming from eBay Italy, but VAT was charged (and paid) at checkout.
On the Royal Fail tracking system, they triumphantly announce:
We've got it. This item has been received at LANGLEY HWDC, United Kingdom. More information will be available as it travels through our UK network.
Oh - and they're still using the same b/s excuse:
We're working hard to meet our usual delivery aims. If we can’t – because of the continued effects of Coronavirus on our people and ways of working – we’ll deliver as soon as possible. For UK items a further update will be provided when it reaches your local delivery office. For awareness, you may get two deliveries in one day. Sorry for any inconvenience. Find out more about services in your area, the UK and other countries.