Sanlam Gap Cover

I Took out gap cover because it seems like a good thing to do, first month goes good second month I recieve a sms that they will be taking double payment \, so i phone them and ask why ? they cant answer me, in any case my payment is R200 per month, so I sent sanlam an email regarding this to thier billing department, one month later no help and no reply, the double payment the took was over R500 luckily i could dispute the transcation, and now this month nearly R800, that is ***** my dear friends. I am not very happy as I asked them before to cancel my cover.