ESA to UC Migration.. Can't edit details on online form

Hi,
I just wondered if anyone here is experiencing problems editing details on the UC online form.
I've completed the sections, but there are 2 sections I need to edit... It shows you a list of all your answers (Nationality, Savings etc) & you click either yes, you agree the details are correct, or no, you need to change them.
I need to edit 2 - the Savings section & Housing... So, clicking yes to the others that are correct, but no to the others... I'm in a loop of it not doing anything - there is no page to edit the details...
Have tried 2 different devices & 2 browsers, still the same problem.
I rang the UC helpline & explained.. At first she said 'I don't think you can edit'... I said you can... Anyway, after her going off for help, suggested submitting & basically sorting it out after (It can't be submitted, because the ID stage hasn't been completed yet)
She gave me the other UC number & said maybe they could change it for me (not doing that)... Also to try later, incase it's the system playing up..... I could be doing something wrong & not realise it 😔....... Any advice would be very much appreciated... Thanks 🙂

Thanks Bis 🙂
Fortunately, I was able to do it, but noticed it was just after 9am... So, whether it was in fact the system (it seems a coincidence it started working a few mins after 9am)... All the money that's been spent on UC over the years, you'd think they'd have a far superior IT system 🙄
Many thanks 😊

Ps... On a personal note, I did also ring the CAB helpline to ask for advice (just before it all started working)... The woman I spoke with was very helpful & also offered to do a benefits calculation etc...
My experience with the CAB was better than the regular UC helpline (who I felt didn't know a lot)