The CBSA has historically used student Officers (through the Federal Student Work Experience Program) to bolster its ranks during times of increased pressure.
I would imagine that in this time of border closures, people are ordering much more through the mail and inundating their postal processing centres.
Cue a bunch of post-secondary students to come along and deal with low-risk packages while the trained people deal with the likes of fentanyl and a growing list of synthetic poisons being smuggled.
Inexperienced students + capacity issues + minimal oversight = a perfect recipe for errors.
You’ll be granted the appeal in short order unless there’s some other firearm that Tikka made that magazine to fit into that happens to be semi-auto.
$hit happens. Too bad it’s going to cause you to waste your time proving your case to them though.