You can import your private key/seed phrase into Mycelium wallet on mobile to make a CPFP transaction.
When you import your private key, go to the transaction tab, highlight the unconfirmed transaction, press the menu button and select "bump fee/CPFP"
This will create a new transaction spending the unconfirmed outputs with a higher fee for both transactions, so your new transaction and pending transaction from the bitcoin ATM will be confirmed at the same time.