This is ridiculous - had some time to kill so tried ringing again, but now, no matter what combination of options I pick, I end up with a voice asking me if I want a link to the relevant web page texting to me: if you say yes, you get a link saying you have to ring up, and if you do nothing, then you just get hung up on.
All I want to do is give my STAC code - why isn't there an option to do this in the app like there is with the company I'm switching from? Then it'd all be over and done with in seconds.