Need more info.
Hi, and welcome!
Did you download a talking caller id app? If you did, just delete the app. If not, what phone are you using? I am sure there is a setting that can be toggled on and off if it is an app that came with the phone.
You might want to sign up for forums, find your phone's section and ask other users of your specific phone. Folks on here are really helpful.
Hope this helps.