I'm having the same issue on my end, except mine started in October 2023, while I was on vacation. It seemed to have leveled off after my return with intermittent spikes of around 2-3 days. Not enough to put me over the 1,280, but enough to make me concerned. That was until 2/19 when my data spiked again and hasn't stopped since (1.2TB in the last 13 days). I've spent so much time on the phone with Tier 2 customer service and have had multiple back office tickets. I'm hoping someone can figure this out because I know for certain I am not using this data.