Telkom cancelled my BUSINESS mobile number

Nearing the end of my 24 month Mobile contract, I followed the Telkom instructions to cancel my mobile contract and convert the number to pre-paid while I decide what Mobile contract I wish to take at a later less busy season in my business.<br> My business operates through this number, i run a busy production company and am out of the office all the time. <br> I received no further communication from Telkom regarding my request.<br> On the 26 October 2015, with no notice whatsoever, my line was just cut. The reason was apparently non-payment. However while the error message there is usually \line is suspended"this says that my line is \""locked\"" meaning I am unable to make calls"