You are not the only one. They have robbed the heck out of me too.
I deposited $500 worth of bitcoin once, it even showed that I had deposited $500, but only $120 showed up in my account.
I made enough noise that the CEO dude refunded me, here's the kicker, he didn't even check to see what was up, just asked me what i thought he owed me and then sent me $380 in bitcoin. Can you see someone who isn't running a scam doing that? Just to shut me up, then he quickly erased all my posts in their telegram room, also something that an honest businessman would never do.They  tried giving me that line of BS as well, balance fluctuates, blah blah. That's pretty bad when it fluctuates from $500 to $120 in the time between me making the deposit and it being credited to my account.

Since then I have tried a few other deposits. Sometimes, but very rarely it will credit the entire deposit to my account, like it should. Sometimes though $100 becomes $50.  In nearly every case making a deposit costs me $25-30, with no explanation of where it went.