Hi ruaakaseki,
If your hosting server is GoDaddy,
Please Sign into GoDaddy. Go to Web Hosting > Launch > Content > Form Mail > change address to match that used as a destination for the form mail in your WordPress installation.
If your hosting service is different company please contact with them.
Hi ruaakaseki,
Please update your theme and deactivate all your plugin and try it again. If you still have the problem please contact with your server company.
Thanks