Ooops! Sorry to see that Stevie

What a crap thing to have happen.
I’m a bit late to the party here but how about getting the car up on the ramps of a trusted MOT station to check for obvious visible damage and then get it to a respected wheel alignment specialist if all appears well.
Unless there’s obvious expensive damage it’s not worth the hassle of an insurance claim.
A few years ago VW dealers were being encouraged by VW to invest in state of the art wheel alignment gear but that sort of equipment needs someone well trained and experienced using it, not the work experience kid.
A good MOT tester would/should see pretty much everything a £1700 VW inspection would for an hours labour charge!
The radar will only need recalibration if there’s significant damage in which case it’s likely an insurance job anyway. If just a few settings have been knocked out of place (assuming the wheel absorbed most of the impact) then a good 4 wheel alignment will put everything back to factory settings.
It’s usually more viable to buy a set of Prets than a second hand single. If you pick up a set for say £1k, add in a refurb to one or two then keep two (one on the car and one spare) and sell the other two as singles on eBay or VWROC.
I hope it all pans out ok Stevie