Ended 3V3 SE filament won’t go in

Hello, I recently got an Ender 3 V3 SE, have got some ok prints, but recently tried to change filament mid print, I paused it, removed the filament and then used the nozzle cleaner metal stick thing, then when I tried to put the filament in, it wouldn’t fit. My brother is currently trying to remove the blockage, and the extrude/retract functions didn’t do anything. Could someone help?

Just checking you didn’t buy 2.85mm filament rather than 1.75mm

Turns out it was a blockage, which we removed, and it was 1.75mm filament, it had been working then went to pause and swap filaments mid print, think that poked the lump of filament that was still there.