HP Officejet 8600 Pro ink system failure

I purchased an HP Officejet 8600 Pro all-in-one printer in August 2013 (R1999). This printer has served me well for two years and during this time I have replaced the black ink cartridge twice.<br> Recently the yellow ink ran out and despite me setting the printer properties to print \Black ink only""; and gave me some instructions on clearing it; or contact HP support. <br> I tried everything according to HP and other Google instructions - this is a very common error.<br> Nothing worked. I then took the printer to an HP service centre and now they tell me it will cost R1600 to replace the print head. <br> This is nonsense... Why should this fail and what happens next time I replace all colour cartridges?<br> I want HP to pay for the cost of repair;or refund me all costs."""