Do the headphones appear in your 'device's' BT list?
If so and it still doesn't pair have you tried 'forgetting' the device in your 'device's' BT list and then trying to pair it again?
Apologies if you have tried this, just double checking.
If it doesn't work check to see if there is a firmware update available that you can load, that hopefully might resolve the problem by correcting any corrupted data, if that is the problem. This is only a suggestion and may not work if the headphones already have the latest firmware version installed and a reload of the same version is not allowed, only updates or if there are no updates to be had. I do not have a set to try it and find out.
Here is a link that describes what to do.
Был ли этот ответ полезен?