Telkom service cancellations

Telkom service cancellations do no work at all. I've created an online profile and uploaded all the supporting documentation, submitted a cancellation and some 3 months later I am still getting billed. I have tried to submit another online cancellation but it's blocked because the "request is already logged" I have even downloaded a manual cancellation form and submitted to 10210 and servcancellation Telkom email addresses and the servcancellation email address returns with a 550 #5.1.0 Address rejected. response