EP-K01 - Left earphone doesn't seem to work


I just purchased the ep-k01. it had been working fine with my iphone, until I used it to pair with a laptop. The sound was horrible and had to pair and unpair. Eventually just gave up and removed connection from laptop.
Now when i tried to pair with my iphone, only the right side will pair. Furthermore the left one doesn’t seem to function. Initially it will will seem to work when i take it out of the charging case, but after hearing the pairing sound, it will stop, and i pressing it will do nothing.
Not sure if there’s a hard reset method I can do?

Have a look at the manual and see if it is possible to do a reset on them, I would imagine that would fix it