Ghostbusters purchase not available

Hi

I purchased the original Ghostbusters film some time ago from the iTunes store. For some reason the film has not been downloaded to my Mac (although that is fine as I would rather stream in 4K) but I cannot find it in my Apple TV app (and previously iTunes). When I check in the iTunes store the film has a price alongside it as if I have not purchased. However if I try to buy it again, I get a message telling me I have already bought the film and would I like to download it? I decided to download it today rather than try to keep it in the cloud to see if that made a difference, but again the film is no where to be seen.

Any thoughts on this would be appreaciated