Deleted

If you made giveaways in the past and didn't deliver (not your case), or had them deleted (your case), then you lose giveaway slots.

Just make "Other" ticket.

Support usually responds quicker to request like rerolling and more giveaway slots, so I say, just make that ticket. Not much else you can do.

Your profile shows 0 past and 0 current giveaways.

Either you made a booboo in the past and lost your slot(s) on a bad giveaway, or you are experiencing a bug, or you lost your giveaway slots for another reason. Which is it?

I'm going to be the bad guy but:

• Why keep going on about being able to create a GA a few months ago when it seems to be untrue as far as we can tell?
• Why assume that support wouldn't react in a timely manner? With important issues I've experienced them reacting fast and with good answers/solutions :)

Just make the ticket and accept the outcome.
That works a lot better than a thread like this, where no-one can do anything but guess.

You start with three giveaway slots, you said you made a giveaway for three copies of Anno 2070. You deleted it so now you have zero slots. Submit the ticket and wait.

get rid of your old tickets and send a new one requesting more slots...
pick the correct category for it. support will reply whether granting you those or just telling you the request is denied.