u/Imaginary-Lime8523

I know I’m getting to this a bit late, but I’ve had my Opuntia for two years now. Over the past year, white and brown spots have started appearing on it, and now there are also green ones. I was hoping it would somehow recover on its own over time, but unfortunately it seems to be getting worse, and I’d like to help it. What can I do? My friend suggested throwing it in the bin, which I strongly refused.