promo code applied but still get billed

[premium]

here is the problem

description

i setup promo code for hosting package "startupx2", and i want to give them free for 6 month

 

so i setup promo code

with -

percent : 100

billing cyle : semi annually

-------------------------------------

above setting should give me : free six month hosting

 

now we are going to order

 

 

1. choose "startupX2" package

2. enter whatsoever domain name you have

3. billilng cycle - please choose "6 month"

4. use promo code "free6month"

5. fill necessary information

 

till here i can see that i pay nothing a.k.a zero

 

but on my email i receive two email subject with different value

 

1st email : "customer invoice" ..it charges me amount of money

2nd email : "order confirmation" .. it shows that i pay nothing Rp 0

 

then ...

i check with whmcs

on billing , it really shows that i get billed certain amount of money

 

 

this is the problem. how to solve this