Most likely this is a pending transaction on your account and not an actual charge. Sometimes credit card companies will hold pending transactions for 3-5 days. These will appear on your online statements from your credit card company, but are not actual charges. Rather, they are holds that will be released within 3-5 business days depending on your credit card company.
If you are seeing an unexpected charge for a text campaign you have sent, check to see how much your MMS messages cost. For some plans, an MMS message (multimedia messages >1600 characters) may cost 3 credits per text sent to each recipient. If you go to create a New Message and enter at least 1600 characters, a message will appear showing if it costs 3 credits per message.
If you would like to verify this with our Billing Department please contact us.