Google add ins Advert web page

i just need a single page website with user account creation to use google add ins on it, and which the website will be able to reward each user that complete the task required of him or her with gsm mobile phone air time recharge card, and will only available to those who are in my country... my country is nigeria, network that i want it to compatible with are mtn, glo, etisalat, ait tel... thank you