Bluetooth keeps re-connecting to iPhone - will not turn off

The bluetooth software in my 2010 Pruis suddenly decided to continuously try connecting with my iPhone 6 Plus when I get in the car and start it. I try "hanging-up" the call using the button on the steering wheel, but my radio is repeatedly interrupted by the software trying to "talk" to my phone. I can't turn that function off unless I turn off my Bluetooth option on the phone.
Any suggestions, similar problems, or help would be greatly appreciated. And yes, my extended warranty just ended in February.