My right earbud does not work

Hello. I bought razer hammerheads true wireless (1 gen / 2019 model) 3 months ago ish. I brought them to school because i needed them for a project. When i got home i tried to connect my earbuds to my phone but only the left one works. i thought it was out of battery so i charged them over night. Next day the right one still didn't work and they cant even connect to razer audio app. I didn't buy them from the razer website plus i live outside USA. Does anyone know how to fix it?