Playonline suddenly very slow

Hello

Decided to get back to ffxi for awhile, haven't played since february.
So yesterday when I quit work I stayed with my laptop to update all that needed to update.
I could log on on all of my 3 characters with no problem at all.

But when I got home and wanted to log back on, playonline started to act weird. Right when I choose my account and type my password to login, playonline gets super slow and I can't really get anywhere.
Shouldn't be anything wrong with my internet connection, have been playing without any trouble before, and I have no problem with anything else online, only playonline.

I've also tried going online on my phone, and that works. So there must be something wrong with the usb-modem.
I've called my internet provider, but they didn't know!

Have been searching for clues online, but no luck! Trying my luck here before I reinstall the entire game since I dont have unlimited traffic on my internet for the update at this time.

Cheers!

Tried another dongle, doesn't work! Still works fine with my phones internet and wifi. I don't have unlimited data on my phone, so I'd prefer to use my dongle tho.

Seen other people with the same problem, but I've never seen a fix for it.

Both SE and my ISP customer support says they never heard of this :/

Update.
I disabled QoS and now I can get in to the game. But it is very unplayable, can hardly walk forward.