Can't log into the Sims 3 Game Launcher

See my answer here: http://answers.ea.com/t5/The-Sims-3/Sims-3-Game-Launcher-Can-t-Log-In/m-p/1444606

That doesn't help. I already said that I can log into the website just fine and I have already cleared the Internet Explorer browser cache.

There's a file in documents\electronicarts\thesims3\downloads that has your email address as file name. Delete that.

It could also be because of the maintanance that's going on.

Did you try downloading the stuff without logging in the launcher ? Start the launcher, open the website, login and then click on download. 

I can't log in. I can log into Origin fine and when I put in my details to get onto sims, it says 'New User Registration' so I enter my password, gender and tick 'I accept T&C, and it doesn't let me press sign in at the bottom? It's really annoying me because I have been waiting to play this for ages.

Did you fill out all the fields ? As far as I remember there's also a CAPTCHA

You can also try to use a different browser.

none of the answers here are helpful at all. I have done all of this, I still cannot log in via the launcher because the login-window keeps popping up again. Don't tell me to delete cookies or clear my cache or any **bleep** like that, because first I have already done that and second  the issue is not with my browser, it is the launcher.

Can you login on the website ok ?

DId you recently change your password ?

No, I did not change anything at all except trying to use Dragon Valley, which I can only access if I log in after the launcher openes. My password works and I can log in everywhere (origins etc.) except the launcher. I guess I bought this dragon valley ** for nothing. Or is there a solution yet? BTW my game is up-to date, the problem was there before and after updating to the newest version.

I would contact a game advisor so they can take a look at your account to see if something is not as it should be.

We're users here so we can't do that

Game advisors can be found through live chat.

1. https://help.ea.com/en/contact-us/ 
2. Click on the orange NEXT button
3. Select a platform
4. Click on the orange NEXT button
5. Select a topic and describe your problem in a few words
6. Click on the orange NEXT button
7. Click Chat Now to chat with a Game Advisor
   

In Details here: How to contact a Game Advisor using the new EA Help page

thanks, but that did not help either, the bots you recommended I should talk to could not help because after deleting everything the generically asked my do delete (re-install, reset etc.) the problem still persists.