when does new allowance start?

[#1]

Hi there
In March I went over my 10GB value allowance so my internet speed was restricted to 100kbps.
Does anyone know when my speed with return back  to normal as it's now 1st April and it's still restricted to around 100kbps?
cheers
Ian

[#2]

On your next monthly billing date. You can see when this is on the view my usage page.