If you delete a text message on an iPhone, that message will be deleted forever, unless you've recently made a backup of the iPhone to your computer. If you do, you can use the TextPad application to locate and recover the text message you deleted.
Text messages are saved in your last iTunes or iCloud backup. You could retrieve deleted text messages from iPhone using one of those backups, and get the messages that were on the iPhone at that time with FonePaw iPhone Data Recovery.
I don't what's textpad,but I know Mobiledic iData recovery program ( http://www.mobiledic.com/ios-data-recovery.html) because I used it to retrieve my contacts from iPhone plus, maybe it also works with you.
With the help of the recovery software, which is a tool for iPhone users to retrieve the deleted data, you can get them back in few steps. There are two popular and useful ways to make it. One way is that you can recover the data from iPhone directly. Recover text messages iphone. The other way is that you can recover data from iTunes backup, only if you have made the backup.