I bought a 5g router yesterday to use wifi at home, and so I disabled cellular on my phone. Prior to disabling, my usage was roughly 10%, today - after data has been disabled for almost 24 hours, my data usage is at 41%. I made sure all the apps are disabled from using data, too.
I'm upset because I changed my plan for the next billing period to 500mb/month vs my current 2gb/month to save some money. Now I'm extremely worried about being charged for nonexistent data usage.
What can I do?