Bad service

I am still struggling with the same situation I reported two months ago.I cancelled my Vodacom insurance of my cellphone in August 2020 but I can tell you they still deducting that money.funny thing sometimes they deduct R112 sometimes R90 I really don't know what is going on.they called me after I wrote the letter for you but nothing has been solved.deduction continued.i suppose to pay R279 on my phone but now I am paying R344 sometimes R434 vice versa