Telkom business line disgrace

We have now been struggling to cancel 2 separate business accounts respectively since March and July. Every time we get the same email address to put the request on a company letterhead with copy of an ID and send to the stocst email address. This has been done NUMEROUS times with no avail. This is extremely unprofessional and Telkom is now costing us a lot of money for a service we have not been using since March and July. We need answers please.