HP SHOP NEED TO GET THEIR ACT TOGETHER

On 20/02/2015, I purchased a new printer from HP Shop and on 09/04/2015, I ordered and paid for a bundle of 4 new ink cartridges for my HP printer. After a huge fight and going backwards and forwards, I eventually received my cartridges. When I replaced one of my cartridges, it didn't show that I had put in a new cartridge. On Tuesday 05/05/2015, I called someone in the sales department at HP Shop and while on the line with this man, I tried another cartridge and that also didn't work so I arranged to send all the cartridges back and the man I spoke with promised me faithfully that the couriers would collect the cartridges that didn't work on Wednesday 06/05/2015 and that I would have replacement cartridges on Thursday 07/05/2015. Needless to say, not only were the cartridges that don't work not collected as promised, but I also didn't get the replacement cartridges. I am now sitting with a bundle of cartridges that I have paid for and cannot use. HP, you need to get your act together!!!!!