Not really a script but a list of commands. Random mashup of some of them will fix headphones.

fix_bluetooth_headphones.sh

# see what's the bluetooth status
bluetoothctl

# bluetooth config
sudo vi /etc/bluetooth/main.conf

# list wireless devices and if they are enabled
rfkill list

# hard reset of bluetooth
rfkill block bluetooth
rfkill unblock bluetooth

# list bluetooth devices
bt-device -l

# rm bluetooth device
bt-device -r <mac>

# restart bluetooth service
sudo service bluetooth restart

how I reset my headphones

bt-device -i "MOMENTUM 3" | grep "Address" | awk '{print $2}' | xargs bt-device -r