installer error

I need help bro.
When i install the game, the installer shows error. Its says NSIS error. Installer integrity check has failed. Common causes include incomplete download and damaged media. Bla bla bla.
I downloaded from the official web. I downloaded twice but its still errors. Anyone can help me plz? Thx b4. Sorry 4 my bad english.

Bro did you try sending ticket to Playwith Customer service, im sure they can help you out.

Yes, i did. No response yet.