[Refused activation despite £89 purchase yesterday]

I have had Affinity photo and Affinity designer on my iMac for years. They were purchased using a Bt email address that is no longer valid as I am on gmail.

You sent me notification on my gmail address that the new versions were available. I purchased the suite yesterday in the App Store. After downloads were completed activation was used, telling me that I don't have a valid licence. I re registered my old software using my gmail address and a new password to get into my account. I am still being refused access.

Please advise as I am being told by Apple that I have only 14 days to cancel.