I have a second hand VR2800 and I am trying to get it linked to my TP-Link ID but I'm getting the error message that it is bound to another ID, how do I get it unbound so I can assign to my ID?

If I am uploading files e.g. to wetransfer.com over http the router seems to max out performance-wise and other machines on my network get dreadful performance with dropped connections, very slow brow

Just purchased a VR2800 which installed fine and connected to Plusnet wth no issues at all. Ran for a couple of days and then attempted to upgrade the firmware to the latest on the website (200710) an