Безопасен ли 999inks.co.uk?

Not sure why this site is so badly rated? I used them through topcashback - out of 4 inks one wasn't recognised by printer and cashback never tracked (is still in dispute 7 months later.) The other 3 were okay and had no other problems with the transaction - average rating from me. Can't see why anyone would rate this red in child-safety? edit: I did email the site to mention the faulty cartridge, specifically not asking for refund or replacement - just warning they may have had a bad batch - no reply in weeks (apart from dozens of spam messages trying to get more sales.) This pushes my review into bad customer experience (still no child safety issues!)