Never shop at Cartridge Hyper Honey Junction

I bought two HP cartridges a colour and a black and white cartridge at the Honey Junction store next to Pick 'n Pay. Spent R1000 on dud cartridges which I suspect are refills. The black and white cartridge stopped working after about 15 prints and the colour cartridge is not printing all the colours. I took the cartridges back to the store and was advised the cartridges cannot be exchanged and have to forfeit my R1000 as the owner (Marco Freitas) who lives in Cape Town said he is not prepared to assist me as he will be out of pocket. The cartridges were weighed 25g and 28.5g respectively (+- 90% full) which was still within their exchange specifications. They claim I did not have the till slip of a few months ago and cannot assist even after I offered to provide my bank records to indicate the purchase. They then went further to indicate that HP seems to be the problem in providing sub-standard cartridges.