Sorry to hear it. I guess if you have had enough I don't blame you. I'm also pretty new at this and had almost the exact same situation as you. What I did was dump the tank, refill and then just dosed it back up to 2.5 every time it dropped to 0. In a few days I was completely cycled. I added 14 fish all on the same day and everyone of them is still alive approx 8 weeks later. I believe it took my tank about 9 weeks. Hope you change your mind.