it seems you also have spaces in the filemname. the spaces must be escaped too. And you don't need to escape the '.'

One way to do it automatically right is to write 'rm popda' on the command line, then use the tab key for command completion. Normally the shell will write the rest fo the filename for you correctly escaped.

Another way might be to use a graphical file manager (not sure if this will work)

Or just use

rm popdatck\ .\ \$dept
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