When can I get the referal reward? My friend finis...

When can I get the referal reward? My friend finished the installation about three weeks ago. I emailed but no reply, not easy to contact on the phone, keep sending to voice mail.

addition on 5/3;
I have got reposed from them, told me they sent the referal check on 4/13 but I didn't get it. I have all the records in my email that Post Office sent me after they scand the envelopes of the post. I cannot find any from them. but However they resolved it said will send new check, Will see how it will work for this time.. Thank you.

added on 5/16.
I do not receive the check still.