Unsubscription drama

I am a Forshini group account holder for many years now and I am very unhappy at the services I receive. First of all, I was subscribed to a book I didn't need. When I tried to unsubscribe to it in March 2017 I was told by my local Forshini retail assistant that it was all handled, after I had filled in forms and signed. Months later I still received the book. I tried again to cancel it over the phone and nothing happened. Other than the book, I canceled my cellphone insurances, after my phones were ****** and it was not replaced by the store. I have been paying months and months of this, with added interest. I feel that I am being ****** as a customer and South African citizen. I just want them to cancel the book and the cellphone insurances and give me back the money they owe me for months and months of payments.