POOR SERVICE

I AM TRYING TO CONTACT MARKETING PERSON WHO WAS SOLD THE PRODUCT FOR MY ACCOUTING , NAME ANUJ PANWAR NO. -8447739012 From last 4 days he is responding my chats Nor picking up my calls , i have issues with my app but no one is availble for short out my problem, while at that time before purchase app everyone is calling and chatting contiuously , I purchase the app because someone recomended , but its terrible