There are many good websites that provides the quality cartridges for the Canon models at a adequate price. So select the best option suitable for you and get it.
You need to make some adjustment with the settings with the printing options or something wrong with the quality of cartridges quality that hampers printing quality. Check that out and get the solution.
It is completely irrelevant that in the stock the required and the best models available and the shop is offering the other model and telling lie that it is out of stock. Users should protest against such malpractices and shoul not purchase any thing from that shop complete ban of their products.