Do you live in an area where you can request free medical treatment? I know my local public hospital offers treatment for excessive sweating that does not respond to antiperspirants, so that may also be your case. If it isn’t, you could try covering your ankles in thick and warm clothes while using thinner socks and see if that helps.

A thin non-cotton pair of socks inside your thickest socks will help you keep warm and help keep your feet dry. Be careful that the two sets of socks aren’t tight enough to restrict circulation though.

Keeping you core temp up and blood pumping helps too. I also find that having my feet up when I am at home keeps them warmer. Not sure if that’s just because I have cold floors or if it is another circulation thing.

I like those shoes that basically are made from mesh, it helps very well with sweating.

I also have very sweaty feet and honestly having a good pair of cotton socks helps a lot, you need to try to get some that have at least like 90% cotton, you’ll know they’re for real if they’re not elastic, the ones that are elastic basically have some kind of plastic fiber which makes you sweat a lot more. Then I use feet powder, but don’t use too much because otherwise you create a layer of feet powder and sweat which starts to accumulate and it’s also bad. Also another super tip is that you need to change your socks relatively frequent (I try to use a pair for 2 days, 3 maximum depending on how much I’ve sweated) and try to not wear socks/shoes at some point in the day so that it can breathe.