I had the same problem with mine and I just kept persevering. I think I eventually managed to get in to 888888's account using 000000 I then set up my own account
Menu Advanced Account Add user
I then signed in and deleted the 888888 account
You probably know the above when you've got in but I hope that helps....
Other passwords I tried (as I cant remember exactly which one eventually worked ), were 09876 012345 and as above
I'm in but can't get the settings right to view remotely, PC and phone