RCS Edgars illigal billing of interest

Account manipulation without consent to charge interest and very poor and rude service from complaints department to rectify. Clients be aware when using your Edgars store card. Tellers must ask you if you want to purchase on 6 months interest free, which they dont in my experience. I have only ever purchased on 6 months interest free and for unknown reasons a store activated the alternative plan which resulted in monthly interest which I only noticed when another client warned me 2 years later. I have a feeling that this is happening to many clients, who just pay the amount due on the billing without checking, like I did. Nice income for RCS. Be aware, check that tellers ask you the correct questions and check your billing for interest. I have investigated among friends and family and see a pattern since RCS has taken over.