Paired tzumi soundmates to fenix 5s plus and volume control not working, just blast at max lvl please advise

hi! Paired my headphones directly to the watch but the volume came out blasting, tried to lower it with the control buttons but it won’t lower or go higher. When pair the headphones with the phone and use the watch to control the phone that’s the only way I can control the volume. It defeats the purpose of getting a fenix plus watch that is suppose to play music without bringing your phone on your activities.