Telkom - fight to cancel

I haven't had internet since the 2nd of Feb. Telkom can't or won't provide any feedback regarding when it'll be back up. I sent the cancellation form to Telkom on the 21st of Feb. To date I have yet to receive any kind of acknowledgement of the cancellation. Convenient, considering I have to give 30 days notice. 30 days from when I send the cancellation, or 30 days from when you actually decide to acknowledge it?? Also, I'm going to assume that my Feb invoice will be ZERO, as I have had NO internet for the entire month??