You can change a rebill if it's still pending and not processed. Here's what you can do.
Change the rebill amount For step-by-step instructions, see topic: Change a debit amount
Change the rebill date For step-by-step instructions, see topic: Change a debit date
Remove the rebill debit (the removed debit will no longer appear in the customer's debit listing) For step-by-step instructions, see topic: I don't want to collect a specific debit