neilo- See the contact info I put in your newer thread on this subject.
Please accept the statement from more experienced players here. It doesn't matter whether WE feel it is WGTs business or not or a reflection on their business. WGT for years has made it a policy to disappear in most (not all, but most) issues involving credits from third party vendors. They feel no responsibility to take care of their members by holding those vendors to performance and conduct standards that are routine for almost every other business out there in today's world.
WGT got your money. WGT got the third party vendor's advertising money based on giving them access to you. WGT feels it has no responsibility for anything other than putting the two in contact with each other and collecting money for doing that.