Hi there Hanna I’m sorry to hear that the black ink cartridge you bought for your printer didn’t work. I can certainly understand why that would be an unwelcome surprise especially considering you had to buy another cartridge. I want to help you resolve this situation so I’ll offer some information and a resource I hope will meet that goal. When an ink cartridge performs like yours did and you believe it’s defective I suggest that you contact the seller who sent you the cartridge. You can do that by going to: staples.com/sbd/cre/help-center/returns-policy If it’s a defective genuine HP cartridge and the seller does not replace it or refund your money and it’s still within the “warranty ends” date on the side of it contact us via this link: hp.com/contactHP Keith Bowers Reviews Response U.S. Printers Hardware