They need to explain their contracts thoroughly

MTN ****, my contract ended end of Aug apparently i was supposed to have called to cancel the contract wow, September billing comes back two times what i normally pay and they tell me that my number is on month to month not on contract anymore they say it’s now recurring 😳i have not used their sim card for two months so what exactly has recurred, their agents are so not consistent because one of them told me i was charged VAT R1000 extra for VAT … i cant wait for my other contract to end in Feb and it’s bye bye ********