Welcome to the community and thanks for posting.
My apologies that you are experiencing loss of broadband service.
Looking at your account, I can see that you have called through to us and arranged for an engineer appointment to look at this for you, which is great.
Let us know how the visit goes.
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Adrian_dobranis wrote:Actually i was want it to know if i can do something on my own before ... as i really need internet right now
Have you tried powering off the superhub, leaving it for a few minutes, and then powering back on again? Also check that the cable connection to the back of the hub is not loose.