@Keunnefeng61 This should not really be a problem, but perhaps the Internet is not yet active, we are only customers like you here, so I would advise you to call the hotline 0800 800800 and they can then see where the error lies.
Bills are usually due once a month, you can check in MySwisscom, see link below, whether there is already a bill, there you can also set how the bill is sent to you, paper (chargeable) or by e-mail (not chargeable).
Bills - My Swisscom