My character swapped class’s somehow??

Usually I would just deal with situations like this, but veilguard is my favourite game, and with this being my first ever full playthrough, it’s kinda frustrating me! Basic rundown, my Rook/character was an antivian crow rogue for 41 levels! Got to the mission ‘When plans align’ that leads to the end of the main story as most will know. On hour 34 (yes I’m slow with gameplay but I was doing a more focused playthrough instead of rushing). Then I went to play today and he’s a mage! Which sure is cool and maybe I wouldn’t mind! But I’ve lost all my equipment! Like all of it. All the stuff is the starting gear at the very beginning! And In the level 43 slot he has 12 skills and only 2 extra points! I just want to know what’s happened and if I can fix it without having to replay the 4 hours I did where I went over a bunch of side missions! This is and still will be one of my favourite games ever but it’s made me really stop enjoying it as of right now!

please help T-T