Earphones right side not working

Hello everyone!

Today I got a problem, few days ago I bought KZ ED9 earphones, they sounded great everything was working as intended, but now few hours ago right bud stopped working on my phone, tablet. When I plug it into my laptop both buds work, I tried searching any possible fixes but could not find any. Does anyone know what is the problem and how to fix it? Already tried it on multiple phones with no success.
 
Make sure you push the plug ALL THE WAY IN - - it tends to feel right, but that's just the first pin - - get it fully seated :)
 
Yes, there's a triple contact and frequently the user feels the first but doesn't push completely down to contact the lower connection.
 
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