Expired subscription

I bought a personal Microsoft 365 package at Makro for R1000. The subscription is supposed to be for 12 months but it expired a month after I activated it. I went to Makro and they say it’s a Microsoft problem. I’ve been trying to call Microsoft but there’s no direct customer care line, just chatbots. It’s so frustrating because this is a lot of money and I literally cannot even access anything.