EP-T25 left earbud not charging properly

I received these earbuds in Sept’2020 and they were working perfectly until today wherein I noticed the left earbud wasn’t charging up when I put it in the case. Also it had basically no charge when I put it in to play music; the earbud almost immediately would chime the low battery bell, and thus I put it again in the charging case to no avail. The right earbud is still working perfectly, though I fear it might have to do something with the charging contacts. Any ideas on the actual issue? Thanks