Stleo7, we're sorry to hear that your device is displaying a delivery error message even though the texts are actually going through. We'd love to help find out what's going on right away. Please tell us, when did this issue begin? What is the make and model of your device? To be sure, what texting app are you using?
Those details are very helpful, Stleo7. I know how important it is to be able to send and receive text messages, and I want to resolve this issue as soon as possible. We need to check some basics first, please check the software Build number as per this link (https://www.verizon.com/support/knowledge-base-210994/) and share a screenshot showing the Build number.