Thanks for posting. Sorry to hear of the wireless speed issues you are experiencing. Is the speed over a wired connection any better? I'm unable to locate your details to run some checks on your connection so I will send you a PM for some additional information.
The Superhub 2 and AC are already available to existing customers. It's always worth giving our customer services team a quick call on 150 from any Virgin Media landline or 0345 454 1111 to see what offers are available to you