Can't log in account, always says invalid pass/user.

I can't log in to my garena account even though I typed the correct password and the username, I don't know why it says incorrect password/username. I just didn't open my account for almost half a year because I'm busy studying, and I have some things to take care of. I promise I didn't change the password or anything, and if I did I might've open it. I also can't 'forgot password' because I don't use the email anymore🥹🥹 and if I picked the number it always says incorrect, idk whyyyyyyy. I just wanted to play because it's christmas break, I wanted to grind my account before back to school. Please help me guys, I really don't know what to do anymore.

Sorry for my bad grammar, english is not my first language.😓