Agreeing to something that you didn't read is on you, not the site. Don't rent a house without reading the lease, don't take a loan or start a job without reading the contract. Don't accept terms without reading them. If you unknowingly agreed to terms, it's on you for not reading them since the site makes the terms of use available to you when creating an account.
I don't know the rest of this story, I don't want to know.
Within their terms they can change the conditions at anytime without notices etc. etc., this means that they can change the terms into their favor at anytime, when they need it changed?