"No Voice Mailbox" case logged 3 weeks ago - still no help

I have a 20G Freeme contract with 4 SIM cards. This contract I opened on the 17th of May 2017.

Only later did I realise that, except for my main phone number, the other 3 SIM cards have no Mailbox. When phoning 181 to set up the Mailbox, the response is "This Mailbox number is not in service." We cannot set up Voice Mail, and no one can leave a message.

I have made the following calls to Telkom Call Centre:

23 August - Case logged: Case number ********** 1. Informed that it will take 72 hours.

25 August - Follow up, it will take 7 working days.

30 August - 2 calls, both confirmed that the case was sent through to the technicians, and I will most probably have feedback by the 1st of September.

3 September - I phoned regarding another matter, and followed up on the case, where the call centre agent informed that the case has NOT been sent through yet. (??) He indicated that he will push it through as urgent.

13 September - follow up, informed that they are still working on the case.

Up to now, no SMS/email has been sent to inform me about this process. Although this is a personal contract, I am using these phones for business purposes (as Telkom declined my application for a small business contract of R150 without giving any valid reasons, I asked and phoned 3 weeks long at the start of the year but gave up).

It is of crucial importance that these Voice Mailboxes work, and I am at a 100% loss about any help from Telkom.

Please assist.