I bought a black toner cartridge in April, 2021 for a Canon inkjet printer. It is now July when I need to replace the toner. The toner is defective and when I contacted customer support I was told that it's past 30 days and can't be returned as well it would need to be unopened. How would I know until I need to use it that it's defective and, how would I know if I don't open it? Completely ridiculous. They wouldn't even give me a discount for a new one to help remedy the situation. I see others have given bad ratings as well. I will take my business elsewhere even if it costs me more, purely on the principle!