Make up an amount of pay...?

Since I've had my dstv account the amount has never stayed the same. And when I request a statement I never receive one. Every month I pay a large amount of money towards this package and then when the time comes for payment we are bul**** into paying any amount they choose or your TV gets switched off. I'm starting to wonder Why pay R800, R900 when I can pay a flat rate of R99 p/month for showmax or Netflix and actually choose what I watching ?! For the last few years dstv have given me +- 7 days Grace period to pay my account and then today out of the blue, no warning no, sms nothing they just switch off... And surprise surprise the amount I now need to pay is not the same as last month. Plus, the month I actually can't make payment on the specified date they refuse to reconnect all of a sudden. For years thy give you a 7 day window to pay and then suddenly.... Nothing. Is anyone else experiencing this?