What to do if you find a mistake on your billing statement? November 09, 2022 17:56 Updated One of the most important reasons to thoroughly review your billing statement is to verify that everything is correct. If you see an error, please contact us HERE. Related articles Does Flex have a customer support number? How do I resume my Flex membership for the upcoming month? What information does a billing statement contain? Does Flex charge late fees or penalties for missed payments? Questions about cancelling my Flex account Comments 0 comments Please sign in to leave a comment.