FYI my issue came right yesterday afternoon but have a laugh at Konami support response.
Hello. Thank you for contacting KONAMI Customer Support.
Regarding your concern, please be informed that the error will appear if the downloaded Live Update File is corrupted.
If you have another connection that is different from the one you are currently using, it is possible that you can prevent this issue from happening again by downloading through that connection.
However, if you do not have any other connection lines, kindly try restarting your device/s such as modem, router and the like.
Should the issue still persist even after following the above-mentioned suggestions, please understand that the error code SGJC427 occurs due to the connection environment you are using.
Due to this, we regret to inform you that we do not have any additional information that we can share with regards to this matter.
Should you have any other concerns, please do note hesitate to contact us again.
We ask for your kind understanding regarding this matter.
Thank you for playing PES2017.
Best Regards,
KONAMI Customer Support Team
Short version.... Stuff You not our problem and good luck to you.