Overcharged for the past 4 months

Please... Fix your system I sign up an contract of 580 per month on ultra explora on April it was installed. may my first payment was R890 which I don't know why...June R650,july R500, August R855...and suddenly I have a Netflix account with them when I call the Netflix help centre they say I don't have an activated account with them. Then I went back to let chat of dstv then I meet an lady who is chlara who gives us attitude... And am telling her as a customer am not happy and it seems it doesn't bother her... This are one reason people don't pay dstv on stop paying their contracts... I just wanna pay 580 not more then that if not then this contract was a **** I agreed on 580