though my O/H was not running her own co.
she was self employed [& so not covered at the time of A/C opening].
& i'm going through the same game with 3 CC's she has
you need to Subject Access Request them [clearly stating the £10 is the statutory fee NOT a payment on the A/C] + request a full signed agreement, PPI policy, and any transcripts of telephone conversations etc they rely on to claim you signed up for the PPI.
i have have also included a line which states 'i wish an agreement signed by myself which clearly show i filled in the PPI option box by hand in ink, not one sent to me already completed by a member of your staff or an automatically generated computer printout'.
that should stitch them up quite nicely.
dx100uk
