Hi,
I will help you with the problem. I'm going to run through a few steps with you. Some of these are diagnostic — they help me narrow down what's wrong, not fix it outright. So if nothing changes after a step, that's normal and expected, not a dead end. I'll keep going until we've got this resolved.
Did you try pressing both the left and right buttons at the same time for about 3 seconds to put the headphones into Pairing mode? It is necessary to pair it properly.
Go to Settings >. Bluetooth & devices > Devices > More Devices settings.
If the device is shown, right-click it and choose Properties.
Open the Services tab and post in the next reply.
I look forward to hearing from you to get the results of the troubleshooting.