im having the same problem phong. i emailed support with ten emails and not 1 reply. i gave my 2 transaction numbers to yakov but no reply also.
my reward token balance was credited with 500 but i still havent recieved tokens from my first transaction of 1.2 eth which was for 1000 tokens.
at this point ive come to the conclusion this may be a scam.
best of luck. hope you get it sorted but i wouldn't get my hopes up.