I download wordpress through 000webhost.com and then I fill form (username and password) of wordpress and then I made a website. But on the next day when I go to wordpress.com and want to open my wordpress account it give error that your username or password is wrong [ERROR: The password you entered for the email or username osama is incorrect. Lost your password?] Please tell me how to solve this issue.
000webhost is not related to wordpress.com, login details are not the same.
use password reset function.
Yes I tried but it did not work
Like he said, the login details on your site here are not shared with any other wordpress site.