“You’ve dialled an incorrect number”

[NicJH]

Dialling my parents’ landline this morning, just as I did yesterday, however today I’m told the number is “incorrect” turns out any call I make to the same dialling code is also incorrect but calls to landlines with a different code go through fine…why has this just started to happen today? My phone is an iPhone 13…

[Christopher_G]

It sounds like your account may have gone into hibernation, @Ibraheem7890 

It's explained here on this 'Why Has My Top Credit Run Out?' help page. If you're still within the activation window, I recommend speaking to our Mobile Care team to see if it can be reactivated.
Chris