Gutter problems - one of the joint is leak.? I bought some stuff from Home Depot but this did not work. What...

I bought some stuff from Home Depot but this did not work.
What would you recomm. I use to stop a leak surrounded by my gutters.
Its only on one enrol that it leaks and to be exact where I step by and the rain hits me surrounded by the face.. so annoying. Please give support to.