I know how you feel I have a wardrobe full of black tops. The only deodorant that worked ended up burning the skin under my arms so I had to stop using it.
Just be careful about any permanent/surgical type treatments. I think botox is one or removal of sweat glands another. WHen you remove the ability to sweat from your arm pits it will appear somewhere else, like your forehead or hands. Your body needs to sweat and it will find another out let so you need to weigh the benefits/risks.