We hardly use 15-20 GB data. Recently I noticed Comcast is reporting 60-70Gb per day. Since 2 days I installed data usage meter app on phone and laptops. When that shows max 10gb, Comcast reports more than 60gb. This is definitely an issue at Comcast side. It’s been happening since March’20. My courtesy month is also over. I have open a case and if this does not solve, have to switch service provider.