Impossible to communicate with Vodacom if mobile reception is impossible.

Hi, It seems I have a problem Vodacom cannot solve. In my home I have no Vodacom reception from about 2 months ago. I contacted 082135 three times. and send an email to Vodacom. The last ticket number was ***. The agent needs an alternative number to contact me. The only alternative number is my wife's Vodacom number which has the same problem of no reception. No one else is in my home and no other numbers are available. Due to the missing reception the person who has to investigate cannot contact me when he/she comes to test the signal. I asked that they use WhatsApp, but that is beyond their understanding. The result is that I pay for a service which Vodacom cannot deliver. How do I solve this chicken/egg problem? Why is it impossible to communicate via email with Vodacom?