serious problem that needs help!!

Hello
Im not sure what has quite happened but for some reason my vestax vci 100 se is causing me some "set threatening" issues

Basically, everything works fine apart from my faders. i noticed at the last party i played at that my left volume fader would annoyingly move up and down slightly when bash the volume up. The right volume fader also has a similar problem: when i pull it down its fine but as soon as it reaches the very bottom it shoots right back up on traktor which obviously is a horrible thing to happen whilst mid set!

I am also having slight issues with the crossfader when i fade it to the left. If i push it quickly over to the left it will go there and repeat to move back and forth only very slightly but will not stay dead on the left side

the actually physical feeling of the two volume faders have changed too, the left one seems to be the same smooth, consistancy as before but has a slight glitch towards the bottom, but the right one feels too smooth, almost slack and at the very bottom seems to hit something causing a sound.

Im very worried about this as i payed a lot of money for it and it is my pride and oy, are these things repairable? would you recommend i take the cover off and have a look for myself?

I really need this to be fixed by next weekend as i have another gig lined up

please help!
thanks
sam

I will try to post a video link of the problem if you have trouble understnading what i mean