Artist Streams Inaccurate

Artist Ren Zotto has had a name change on this app to Katakana, rather than the Latin alphabet. This has meant my streams now read completely inaccurate. e.g Top song is Casket by Ren Zotto at over 100 streams, but total artist streams is only around 20. Super annoying! His name has not changed on Spotify (UK), so confused. Is there no way to merge streams under this new name with all my previous?