So we're having a similar issue and i've had a number of very frustrating interactions with Toob over the last month.
Speedtest to the Toob server shows 900 down, c.100 up over a wired connection and as low as 60 down, 0.5 up over wireless. Connect to any other server on speedtest and the numbers are 900/900 over wired.
Toob maintain that this is because the speedtest server for Toob is not working correctly, however its completely representative of the speeds we've been getting since our IP address was changed at the start of December. For reference we don't pay for a static IP address so we're in a CGNAT cluster.
At first they tried to deny our IP address had changed but when I proved it too them they said it was purely coincidence that since then we've had garbage upload speeds.
They're arguing that because when you speedtest to a different server (ie fareham or IoW) you get good speeds there is no issue.
Very intrigued to see if you get a resolution to the issue. So far they've replaced our router and fibre box and it's not made a blind bit of difference.