I've just removed some from the Panda after a year but only about 5000 miles and they look so much better than yours.
Your centre electrodes are rounded and the gaps are enormous. If this is 2000 miles they'd be seriously defective. However, their general condition and colour look fine, so not showing any engine issues. Hopefully you've changed all four, not just the three pictured.
You will get no joy with the garage after this time. Whilst those plugs don't look new enough, the car has been out of their control for 2 months and 2000 miles, during which time anything could have happened. They'll claim those are not the plugs they fitted, you can't prove they are. Not worth the bother. For the price of new ones, just wear it and enjoy the car.
Can't see what plug number they are, gaps differ. The later plugs for the Panda are pre-gapped at 1.0mm. I think the earlier ones are 0.8mm. No point regapping these, just replace them.