The $50 charge is likely because you opted in to use Data Credits.
When you opt in to use Data Credits, your account is automatically topped off with $50 (500 Data Credits) whenever your data credit balance drops below 50 credits .
BounceShield (1 Credit)
Enrich AI (1 Credit)
Phone Finder (5 Credits)
Go to your Subscription Settings
Bottom Right of Page > Click "Data Credit Settings"
Toggle Settings On / Off