A wrong deposit means your assets were sent to an unintended address, network, or form, so they weren't credited as expected.
The most common cases are sending to the wrong address, sending over the wrong network (chain), missing or mistyping a required tag/memo, or sending an asset or network Trugi doesn't support.
Because blockchain transactions can't be reversed once recorded, what happens next depends on how the deposit went wrong — and many cases can still be resolved if you act quickly.