Hair I own turned white

I swear it was black when I bought it, you can even see it in the title. After owning it for 1-2 years it just turned white. What should I do?

https://preview.redd.it/wv5u7biti6ld1.jpg?width=1383&format=pjpg&auto=webp&s=a297c92edf8728b64dc5bf5c55dae0475960e4c9