Iphone 4S Volume not Working?

My iphone 4S volume is not working. I have tried everything. I spent 50$ on apple support and they couldnt do anything, all they did was get me to restore my phone and called it "professional". When i hit the volume change button nothing comes up and i can't change it in a video or anything. Its silent but the ringer volume works. I'm going insane because i can't listen to music please help! Iv tried brushing out the jack and charger and it doesn't work. I turn it on and off (Hold home and off button and just off button) and after that the volume works for 5 seconds then doesn't work. Please help

Added (1). Earbuds don't work either:/

Then last way use earphone