Mr Min and Reckitt sell inferior products

These guys are the makers/distributers of Mr Min. 2 weeks ago I bought a tin/can of Mr Min through the Checkers 60-60 App, I did not open or use it. This week Wednesday when my cleaner tried to spray, it was not working although it was still full. I checked it myself and it was "flat" there was no gas in it, in such a way that you can even dent the tin with your fingers. I made contact with Reckitt and told them about my situation and that I did not keep the slip, who keeps all their grocery slips? I made them a video of the full tin that could not spray together with photos of everything they required. They said they would send me a voucher to go and buy another tin/can. This morning I received the voucher for R50 from them, I contacted them and send them pictures that the price of Mr Min is R58 (at Pick n Pay) and not R50 what they gave me. They explained to me that they do not replace the faulty product, they just give me a "gesture of goodwill" I feel they have to replace their brand new, completely faulty product! I will not ever buy Mr Min again or any of the products that Reckitt makes or distributes.