Can someone who understands computers please explain to me why this happened. I have been trying for 3 days to order an o2 SIM card from this deal: http://www.hotukdeals.com/item/478584/its-back-02-12-month-sim-contract-8
but every time I add to basket I get a " Please wait, A high number of customers are visiting our online shop at the moment. Please wait a short while and youll be able to continue shopping shortly." I have tried on several different pc's all through my home router and none work. I have rebooted router, cleared cache & cookies and all that stuff but nothing. Then I tried using old style dialup and it worked no problem. Could it be that my IP is being blocked and how can I resolve it. Unplug router overnight I've heard gives you a new IP.