Accidental merger

I accidentally merged two profiles that need to be unmerged:

Christiana Allen (Knight), of Kempston

Joan Deol Allen (Fowler)

I believe whoever made Christiana Allen wife of John Allen, of Kempston in Bedford may have done so in error and the correct wife is Joan Deol Allen. However they are two separate entirely individuals with their own family tree and therefore should never have been merged.

Please help.

thanks