earbuds not working how do you fix it?

ok i got this earbuds not earphones but its auvio brand and i got it like in april and now its june its flat wired. my earbuds started acting up like when i play music one of the sides have a lower volume or like it only plays like some layers of the song. if it has lyrics sometimes it doesnt play the vocals and it will only play like the instrumental part. ok did you ever try like not plugging in the earbuds fully like if its halfway in, ya and it dsnt play like the full audio its like that but i plug it in all the way. help. oh and this happen to my other earbuds to it was an aperture brand flat wired also. im not saying that it happens to all earbuds or like it doesn't happen to one device. i was using my sandisk, dsi xl, iphone, computer it still doesn't work. when i put a new one it works really fine. help because i dont want to buy another one.