What did you do? I’m on the same boat.
I really didn’t do anything after that. I asked for an extension through web form as well as email and got a confirmation from them that they received my request but never really got an extension.
I eventually received the PCCs and uploaded them to my father’s GCKey account, almost 1 month after the original deadline. Right now, in the account, it says that I’ve provided the documents so I’m hoping when they get to my application, they’ll notice the PCCs are available and accordingly process the remainder of the application.
If they choose to object by saying it was sent late, I can put my case forward by sharing that I did apply for an extension request well in advance which was never granted.
Long story short, they should consider a late submission as most reasons for delays are genuine and an extension request was atleast made beforehand.