Deleting all playlists on Apple Music on both my iPhone and iMac

This is impossible. Even if I try and remove one at a time which is ludicrous more duplicate playlists are created in their place. I have now removed Apple Music from my phone, but the playlists are still there on my iMac. I have about 100 duplicate playlists and this is driving me mad. Even when I phoned the Apple helpline they could not advise me how to do it apart from one at a time. I am almost thinking of just removing Apple music from all my devices. I have tried the shift key, the command key and the options key without any affect. I have made a playlist folder and pushed them all in together and then deleted the lot only to see them all return. PLEASE HELP?