EP-B56 won't turn off

I got this headphones almost a year ago and they have always worked perfectly. I used them this morning and everything was fine, but then a while later I turn them on and I couldn’t sync them with my computer, so I pressed the bottom to turn them off, but they won’t do it. They act as if they were turned off because they don’t sync with any device I have (neither my phone nor my computer find them), except they are turned on because the blue light that indicates it is on and I don’t hear the sound they usually make when powering off. Has anyone had this problem before and know how to solve it?