Vodacom n their lies

I am a vodacom contract customer n lately m unhappy with vodacom. Everything was fine up until a consultant called n told me they will increase my airtime but my debit order wont change.that was 2 months ago.....I was paying 223 then I added a router for 129 .m suppose to be paying 352all together but they debiting 515.......when I call they say router is now 149 n m also paying for the increase airtime which I never agreed I was gonna. They told me my debit wont change. M tired of vodacom they r dishonest. I want to expose them n m very unhappy I want my money back