Poor Service and Incorrect Debit orders

I have been a Level 7 client for a few months now. I had asked them for a 2nd line at my home office. The sales person sold me a Fibre line that does not work. On Friday the 19th August we did not have internet. we called the support department and they told me only Vodacom can assist me and it will take 3 to 5 working days for VODACOM to assist. I don't have a contract with VODACOM I have a contract with LEVEL 7 and they simply did not care about the fact that I run a business and lost a lot money as result of the lack of Internet, they simply did not care. I have ask Level 7 to cancel the Vodacom Fibre line because it does not work, they is no internet and they told me that I need to give them a calender notice cancellation and they don't care if the services is off, I will have to pay anyway. They have debited my account for the month of September for a services I will never enjoy. I guess it is their modus operandi of destroy small business by giving poor services and except them to pay for services they don't have.