Unfortunately, here in community we are not able to test REFILE functionality, or see your return, so our phone support team would be better able to help. They are product support, not tax experts. If you don't want a callback, then I can put in an investigation, but I would need to get get some information from you in that case.
I have passed your experience onto the phone support team's management.
FYI: You can also change your return using CRA My Account.
