@Anonymous User
Welcome to the forum. The original Hub had poor wifi performance but the Hub 2 is a far better performance and works very well in my house despite thick stone walls.
By BT Openreach socket I think the help team are asking you to plug the hub into the main 'master' socket rather than any internal extension sockets in the house. If you have only one phone socket that will be the 'master' socket (larger than extension sockets, often with a split plate on front and usually close to where the phone line enters the property). However it sounds like your issue is more to do with wireless performance than broadband speed.
Try rebooting the hub as by default this should make it choose the best wifi channel for your environment (unless you’ve previously chosen a specific wifi channel for it to use).
You might also need to experiment with placement of the hub, generally speaking you want it as central, as high up and as far away from electrical interference, metal obstructions and solid walls as possible, although it's often difficult to move the position of routers too much.
