Ovo Energy

We just bought a property with ovo as the supplier. We cannot ring them at the weekend and we can't register for an online account with them as they don't recognise our email address.....of course they don't because we can't register it with them. What a totally backward company run by people with no commercial experience (are they all 5 year olds I wonder?) Have you ever heard of an energy company where you can't ring them at the weekend? I never have and why can't I register an online account with you? You really are the worst of all the poor energy companies that I have ever delt with and I've dealt with all the major competitors for this award.