[spaghetti]

It's a pity. As you said it's a very good speargun, powerful and accurate, and expensive too. Before throwing it in the waste bin, I would try again and give it a second chance. But mind that loading a long pneumatic with thin 7mm shaft is very technical: I've bent some shafts in the past, so I know what you mean.
Since you don't seem to have much experience with airguns, please accept some tips about loading properly:
-switch the power reductor button on half power to make loading easier.
-stretch you body long in water and place the gun butt on your foot.
-insert shaft, holding its tail with your left hand (this prevents bending) while the right hand pulls the shaft's top downwards.
-when it's half inside, slip left hand on the muzzle and finish the job until you hear the click. Then you can switch the power button back to full power.
remember: using left hand to keep straight the shaft's tail is very important to prevent bending. If you do it properly, everything will be okay.
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website is a problem indeed. I have information that all the spearfishing products of the Mares group will be listed in the new Sporasub site, which is still under construction.