Cartridge Hyper Blue Hills sold almost empty cartridge, no replacement

Cartridge Hyper Blue Hills. Bought a new extra large black cartridge on Monday. Printed around 50 pages and on Tuesday morning no more ink. Phoned the shop and even had to bring in y printer. No problem with my printer, the cartridge is empty and not a defaulted cartridge. There answer, from head office, its a sealed original HP cartridge and they can to nothing about it. They checked the date on the package and cartridge to make sure I did not bring an old empty one, which I did not. The past few months I bought several with them. R415.00 down the drain and I must buy a new one. Was it my fault? No. They sold be a cartridge that was not fully filled with ink. These are just facts. Well another fact, they don't care whether they sold you an empty cartridge and is just interested in receiving the money. Never buy from them , if there is a problem you will walk out being the loser, that's it, deal closed no after service.