USED CELLULAR DATA WHEN CONNECTED TO WIFI!!!!!!

I dont know where else to go, because Skypes customer support is just community answers. However, this is a terrible issue that needs to be addressed very quickly. When I was using the app, I found out I used 1.5 GB of cellular data when I was Skype-ing in my home connected to Wi-Fi. I may have to pay overage fees now, because Skype cant police itself and use the correct Internet connection point. I have since turned off cellular data to Skype, which is not the preferred way, because now I cant get a call when Im out and about from Skype. But what else can I do? Case in point, FaceTime just is superior.

sealab2021 about Skype for iPhone, v6.34.1