Suspended account

I signed up a contract for 40 gigs with Telkom in October.

In December I received an sms saying I owe R1000 (and some change), but I should ignore if I have been paying. Which I ignored because I have a debit order agreement with them.

Last week my line got suspended when I called they told me its because I have not paid.

Now, my problem is I had signed a contract with Telkom to which I gave them my 3 months bank statements (So they should have my correct bank details). I do not understand why they had not been debiting my account, and why I was never contacted or even suspended the first month that they claim I hadn't paid.

I made a call to Telkom and they logged a claim to which they said they would call me in 72 hours. That too has not happened to this day.