Afrihost Wi-Fi getting depleted faster than usual for two months in a row

The last 2 months, my Wi-Fi has been getting depleted around the 24th. I have never experienced this issue on the 4 years I’ve been with them. The habits and screen time in the home have not changed so I do not understand why my Wi-Fi bundle gets depleted at the same time every month. In the past it would roll over to the next month