Not sure what happened, the buds off and placed them in the case, but the case lights won’t stay lit and these are only a month old.
Or maybe the contacts of the earpieces are dirty. Sometimes earwax can cause this problem…
Try cleaning the contacts on the Buds and Case with a Q-Tip and Rubbing Alcohol.
Curious to know if the case has been charged since you got them? Likely all but something to check.
I’d check to make sure the case takes a charge. Would also be nice to know which earbuds you are referencing, as to know how to suggest additional things.