Hammerhead True Wireless charge case not charging

I believe my case has stopped charging. When plugged in, they display a blinking yellow light instead of the static red/orange/green light to show how charged it is. The earbuds worked for a while still because they had a charge remaining, but won't charge back up while in the case whether plugged in or not. Not sure if there's anything I can do but get another one. Any insight?