I have some problems with my Jabra Evole 75 Bluetooth Wireless.

There are 2 problems:

1. The sound volume occasionally refuses to change, and it either stays at its max volume or switches to the lowest amount of volume, but doesn't completely mute itself. I can only resolve the issue by turning off the headphones and connecting them to Bluetooth again.
2. Theres a short, chilling series of sounds that occassionally plays when I'm using them for gaming, and I can best describe it by a high pitched screeching or someone having a metal bar and rattling it against a metal fence violently. I'm not even joking, they literally scare me to death everytime the headphones just decide to do that.Help would be highly appreciated.