I used Aapanel on Upcloud the first time and don't know about this.
After 1 month they said me I used over 30TB ~ 300$ crazy 🙁((
I hope aapanel developt feature to control data transfer and limit that to help admin know how much data exactly transfer to control what happens.
This is my invoice and of course I drop my account because if I want to use to need pay that. So I choose create new ##