Hi Svengps,
Thank you for reaching out to us in our community and welcome, sorry to see you aren't getting your expected speeds since changing from 100 to 200mb, I was able to locate you on our system with the details we have for you and it looks like the Hub has not been rebooted since your upgrade, as you are also using a 3rd party Router there is only so much we can check. Please put our Router back in Modem mode and do a speed test with a wired connection, please make sure the device you are using has a gigabit ethernet card and you are using a Cat 6 or above cable, you will only get the speed the device is able to run ay.
Regards
Paul.