SHOCKING SERVICE

I signed a contract with smart sure for my adsl line with Telkom. Everything was set up and installed. When it came to time for debit they debit me on the 31st of the month where it clearly states on my contract that my payment date is the 15th. Now due to their INCOMPETENCE my line has been suspended as no payment was made. There is a reason why you sign a contract and specifically stipulate what date debit order should be taken off due to budgets etc. I have been trying to sort this issue out for 2 weeks now and up to now nobody has bothered to give me feedback. I am the one calling emailing for feedback and its as if they dont care at all.