https://www.theanswerbank.co.uk/Media-and-TV/Question1727850.html
We've asked you to tell us which device you're trying to watch BBC iPlayer on. (If it's a computer then your browser, or another app, might be diverting your internet traffic via an overseas proxy server but there's no use us pursuing that path if you're using the iPlayer app on a smart TV).
We've also suggested power cycling your router.
As you've not provided us with any response though, it's going to be hard for us to offer any further suggestions until you do.