I sent 75 dollars worth of bitcoims to Alphabay and they went to a different address. It is not like I misspelled it, it is some completely different address. I know they are probably lost but what did I do wrong. If Alphabay stole them they would have went to the address and they would of vanished. I am positive I don't have malware so does anyone have any idea why?
I don't follow what you're saying you did....they give you a new address to deposit to everytime you deposit, so if you're comparing the addresses to what's in your account then its possible they changed and there is a problem on their internal ledger.
If you sent it to the wrong address by no fault but your own, then you are pretty much out that coin.