My Powerbeats pro will not pair with my iPhone

I was having an issue with my right ear bud not working. So, I unpaired the device from my phone and now when I try to pair is back with my iPhone Bluetooth, it will not pick up the device at all. No matter what I do. The light on the Powerbeats pro case just keeps blinking blue/white. I also tried pairing them to my boyfriend’s iPhone and it won’t pick up on his Bluetooth either.