MCent — referral points not credited

Dear sir,

I have referred my 8 friends through my refer id... They installed it first time and created accounts with my referred id and they are new users... Yet i haven't got my refer points. They installed the app through my referral link and also it is showing that 8 friends registered. Out of 8 friends 5 of them used mcent more than 5 days.. I got referral points against 4 friends, but i didn't get rest 1 points. As a result i am not getting 25000 points for the friend who joined with my refer id. I haven't think that mcent can do this type of inconveniences to me..... Plzz help me to solve this issue.. I'm waiting for your prompt response...