I can't buy online

I have been trying to buy a TV since Friday without any luck. I have already verified my TV licence. The website seems to be having some sort of problem.<br> <br> I go to the product and add it to the cart no problem. When I click on checkout it sends me to the cart page. But there's only one button which is continue shopping and no checkout button. I have called and spoke to someone who sent me to the online team but the phone rings and goes to voicemail.<br> <br> Why say I can buy online when your website won't allow me to?