Thanks for reaching out to the Apple Support Communities, Gingerkitty71!
It sounds like you have an issue with calls when you are connected to Wi-Fi. Are you using Wi-Fi Calling on your device? Does this issue happen on other Wi-Fi networks or only your home network? Check out this article to Make a call with Wi-Fi Calling, Specifically:
If you can't turn on or use Wi-Fi Calling, make sure that your carrier offers Wi-Fi Calling and that your devices have the latest software. Then, follow these steps if you can't turn on Wi-Fi Calling or make a Wi-Fi call. Wait two minutes before you go from one step to the next.
- Go to Settings > Phone > Wi-Fi Calling and make sure that Wi-Fi Calling is on.
- Restart your iPhone.
- Connect to a different Wi-Fi network. Not all Wi-Fi networks work with Wi-Fi Calling.
- Turn Wi-Fi Calling off and then on again.
- Go to Settings > General > Reset, and tap Reset Network Settings."
Take care!