Bad customer service only looking to fill their pockets

The worst subscription ever, no clear information given. Upon my initial subscription I had paid fully for the first month of September no worries even got charged R150 for the sim card, the problem started when I didn't have enough funds for them to debit for November and my wifi was cut for the month of October then it had not even been 15 days in the contract. I then went to the store to find out why would the month I fully paid for be disturbed by a debit for the next coming month, no clear information given let alone an attempt to get me to understand because of I didn't pay for November then yes I accept not having wifi for that particular month now I paid the November month fully and I don't know if I'm crazy or what but should I decide to pay later based on my financial stand should I then be held randsome and have my wifi cut off again this month November after having paid fully for the month MTN IS A HORRIBLE MONEY MAKING SCHEME, THE WORST EVER I HAVE ENCOUNTERED