It appears either you have very broken English or you are using an online translation tool to traslate to English.
I've never heard of Digital Swift before, but their domain is about 2 years old. They offer "unlimited bandwidth" and as Artashes said, there's no such thing. They also state that they have 10MBPS UP and DOWN, so there *IS* a limit
10mbps = 108GB per day MAXIMUM up and down combined. (approx 3.2 TB in 1 month). Chances of being able to get 100% usage each day however is minimal.