New Connection. No Internet.

I swapped my Internet from Ziggo to T-Mobile today. I got the kit from T-Mobile. I connected to the Telephone line in my home and i get red light in the modem. I have used to correct wire and the correct port. I see the status in my T-Mobile Thuis login is now active. But no Internet. Its so difficult to call customer care. I am working from home and to work without internet is hard. Please help.