Why are Vodacom clients losing so much data inexplicably and what does Vodacom intend doing to rectify the situation?

On Monday 7 November 2022, they admitted me to the hospital for an "emergency procedure". I had +/- 1.8Gb anytime data and +/- 1.5Gb "night-owl" data on my contract available. I spent 3 days and two nights in the hospital before they discharged me, and I went home. During my stay in the hospital, I phoned and messaged my wife via WhatsApp on 3 or 4 occasions (briefly). At home, as usual, I immediately connected to our home "wi-fi router" to save my data. Yesterday, at around 23h00, I received a notification from Vodacom, that my anytime data had run out, and that I had to purchase extra data or have no network connection other than the "night-owl" data connection. It still blows my mind how this is even remotely possible when we (my wife and I ), both at all times, connect via our wi-fi router at home (laptops, cellphones, etc.). What happened to the available data, and why can't I connect to the Vodacom network via our router at home? I need to get back to my home-based business and am stuck because of this inexplicable situation. Does Vodacom have an answer? It seems I am not the only person having this specific problem.