If you believe you are missing pay, you can view your wage statement in the ADP mobile app. The wage statement will allow you to see how many hours you were paid, the gross pay before taxes, the amount of withholdings from taxes, and your final take home pay. You will also be able to see the pay method that was used to issue your pay.
If you are still having pay issues you can open a support ticket at https://support.fieldworks.com/.