HedaJetTV REU-LTN Hike to our A320. Baggage handlers loaded up as an A319, all luggage in rear hold!

REU-LTN. The baggage handlers loaded up our A320 as an A319 - luggage in rear hold only. No balancing load in the front! We noticed when we saw our own bags being unloaded from the rear hold. I asked cabin crew to find out what was going on & they went to find out. Goodness knows what would have happened if we took off with everything in the rear hold! Tail scrape or worse!!