wi-Fi and Bluetooth disabled

[AC Question]

So I just sold a fully working Nexus 5X to someone on eBay but when they received it they said that wifi and Bluetooth have been disabled. It was running Android 6.0 when sold and they said they upgraded it to Android 7.0 using their service provider. They still had the issue after the update though so I suggested the format the phone, they did but it didn't fix it. I need help resolving this issue as fast as possible.

The icons for wifi and Bluetooth look like this

Wi-Fi
Disabled

Bluetooth
Disabled