NR7303 I lost my sticker and can't access configuration page anymore

MattBest

Hi, I own Zyxel NR7303 and unfortunately I lost my PoE adapter that had the sticker with wifi and admin password on it (I stuck it on the adapter as the manual suggested). Now I can't access the configuration page. I've read that Zyxel can recover my password if I provide the serial number of my device, so here it is:

S240Z09005498

Thank you.