Twitterfollowerstrend specializes Twitter services. You can buy country specific followers from them. They're quite expensive because they have a particular target audience. They also have a 100% Money back guarantee just like the others.
Their Twitter services are also delivered in a gradual manner and not all at once. They posted on their site that they are available 24/7/365, however, they do not have a chat widget or a number to call to for inquiries. You can only reach them through their site contact form. So we don't think this "24/7 Technical Support " claim makes sense.