Hello, I’m Nathan, and I’ll be assisting you today.
Sorry to hear that you’re having trouble with this but I’ll do my best to help you out.
Unfortunately that is not the proper ink for your model The 126 cartridges are for a different series of printer, and while they may physically fit, they have a different computer chip in them and are not compatible with your printer. For your model, the 124 is the lower capacity, and 125 is the larger capacity cartridges. There is no extended capacity cartridge beyond that.
These are the cartridges you need: http://amzn.to/2bKPYhg
Hopefully the retailer will allow you to return that 126 model and trade it in for the correct one.
Do you need more help with this?