We apologize for the problems you are encountering so far and can assure you that we are here to help you out. The little tabs that lock the cartridges into place are quite fragile and need to be handled with carefully. Other than that, the cartridges should be simple to use. It looks like you are encountering a range of problems, so instead of tackling all these issues on the forum, please email us your order number and contact information and one of our customer service representatives will call you to help troubleshoot your issues for you. Please email us at email@example.com
. Hope to hear from you soon!