The worst natural deo I've ever used

Here's what I'll say, this deodorant smells amazing. That's where my compliments end, though.
The first few days I used it, I assumed that the persisting body odour was just my body getting used to the product and that it would subside. After about three weeks of using this, the body odour (which I must note, I've never had difficulty hiding with deodorant) had only mildly improved, but ultimately I still stunk, I suspect, worse than if I hadn't worn deodorant at all. At this point I also developed a moisture rash in both armpits. I have used natural deodorant for years and am aware of the occasional quirks - this stuff, however, was garbage.