That's good quality stuff Maggie.
I haven't any experience of adjusting these, but this, from their website, might help...
"On some of our ranges (our Artisan, Romana and Windsor ranges) you can also adjust the doors and drawers. To adjust the drawer, you will need to remove it from the runners. First take everything out of the drawer. Pull the drawer out. Feel underneath and you will find two finger grips, one each side of the base at the front. Squeeze these to release the drawer. Turn the drawer over and you will see that there are two turn knobs to adjust the alignment from left to right of the drawer. Once adjusted push the runners back in and then slot the drawer in. Push it back until it clicks shut. Try opening it to make sure it is securely fastened and stops when fully opened."
It sounds as though the closing adjustment simply needs tweaking.