Just looked at your account. Which provider did you use (or plan to use)? I couldn't find any past streams.

As for topping up. If you're having a problem with NWC just remove the connection from your settings. Then go to the dashboard and click on "select provider" on the bottom left. Chose a provider (see ping and cost/min). Once you've selected a provider you're taken back to the dashboard.

Next, click on "balance" on the bottom left. this opens a window showing current balance, top-ups and cost of previous streams. On the top-right there is a "Topup" button. If you click on that you can enter any amount and you'll receive a QR code and LN invoice you can copy.

I actually prefer this method myself over auto-topup with NWC. A working NWC connection is more important for zapping than occasional top-ups imo. Hope this helps, hit me up if you need more assistance. Btw, zap.stream also has a discord server. You'll find the link in the top-right menu of the website (click on your profile picture)