Username and Purchased Code is not valid

I purchased an android app code from code canyon and Now I am getting an error in my WP plugin.

I am giving my username and purchase code to that pluginn but there is validation failed.

Please help me otherwise all my apps will be uninstalled soon.

@davidappleyard @ioanis_h Please help me sir.

Hi, You should contact to android app author, using support section. Generally authors reply within one day.