Lame

I just did like 6 different surveys that required my phone and cost me money and received no ZP for it. Total cost is something ******ed like 10-15$ and I dont get anything for it. I did them right as well. Enter my number, wait for pin text, enter pin. No Zp.
On a side note I am wondering how to use your mobile to buy ZP as it says you can now. I get lost at the part where it says select SMS as your payment method though there isnt an option for that, that I can see.