PeeWeeHosting

Right im going to be offering a free month or two to clients. But when i do the promotion 100% off reoccurring etc... the first payment is £0.00 but i want them to get a free month etc.. after they've used their paid months Example: Pay for 3 months get 1 month free. But the free month only applies after they've used their 3 months. Would i have to like change like the next bill date or something?

I would like to know is there was a way i could some how limit what clients join up and from where. Im currently running a hosting site and i want UK clients only. I keep getting people join from Japan, China, Spain etc.. they are placing an order but not paying. Also the domain when i check it, is full of either porn or warez. Ive gotten about 5 in 3 days now and its becoming a joke. Tonight i had some one create an account with a package(Free Package) thats not found on my website no WHMCS. I need this sorting. Help. Btw i already have MaxMind fraud in place.