Right I didn't know where to post this... Mods will probs delete or move it..

I need help I set up a site with a vip section but how do I set up an sms charge eg they call the number (80077) and it comes to me & then gives them a code for like a charge of £1.00 like habbo does..

Can anyone tell me how I set this up or a site I can go to, to set it up.
Thanks if you know
Please don't post if your just gonna say your dumb or somthing because I aint done this before.