I in fact did read the Ts&Cs of this and it quite clearly states that Ziinga offers various memberships:
Membership
Ziinga offers different types of memberships, each with a corresponding monthly fee.


All members get to enjoy value added benefits:


Extra bids for bid package purchases
Free shipping
Free bid
Bid-for-Free auctions
Daily Bid Agent

Once you become a paying member, you can review the benefits and the price of your membership by going to "My Account".

However when you click to accept the T&Cs you are automatically signed up to the platinum membership to which you are charged £59.99 per month and 3 months are binding.

There are definately NO other membership options, so isnt that them breaking their T&Cs?