I have been an Amazon Prime member for a very long time. I added my wife’s account to my household, so that she can take advantage of the Prime benefits. We did not realized that Amazon was charging my wife’s account a monthly subscription for the Prime membership. As far as I know, adding a family member to the Amazon Household should not penalized the household member by paying the monthly Amazon Prime membership. Amazon were charging us since 08/2019 at the same time I am paying the yearly subscription.
Kudos to the Amazon rep I was talking to she at least tried to get me refunded. However, the farthest she can do due to policies is the last 10 months.