Hello and Welcome. My name is ***** ***** I can help.
First of all you need to uninstall all traces of a previously installed google voice app by using an Uninstaller Application such as: "Easy Uninstaller"
Go to the Play Store and type it onto the search bar and install it,
then open the Easy Uninstaller App and look for anything google voice related.
Afterwards try installing the Google Voice App through the Play Store all over again.
Please let me know if you run into further issues.