R127.77 Premium increase without notification!!!

This morning to my surprise my account has be debited for R706.75 as compared to the usual amount of R578.98 . It did occur to me that it is 1 year since i have joined discovery insure so i figured it is the premium increase, however i have not been notified of this increase nor have i accepted this increase!! You cant just go around debiting more money from my account without my knowledge or approval. I have had nothing but endless problems with discovery and i will now be shopping around for alternative insurance companies, even after i had referred discovery to many friends and family, turns out its just about the money and not about the service. <br>