RECOVER ABANDONED CALLS

Hi! I just deployed a solution to recover the abandoned calls from the queue and when no one answers the phone, however I'm not really sure how the billing works for this specific solution since I know it uses Kinesis Stream and Lambda, also I'm trying to see the phone numbers or information about the callers that abandoned the queue, but it's not showing anywhere.

I used this article for reference: https://aws.amazon.com/es/blogs/contact-center/recovering-abandoned-calls-with-amazon-connect/ and I'm being billed this: AWS Step Functions USE1-StateTransition$14.44 $0 for first 4,000 state transitions4,000.000 StateTransitions$0.00 $0.000025 per state transition577,422.000 StateTransitions$14.44

Can someone help me?