well no, because of the 'contacts' bit i mentioned, they failed to uphold their part of the contract without good cause so that would lead me to think i was at least in part in the right taking what i imagine could be fair compensation.
People cannot just keep things and claim them as compensation, if you're honest like you say you are and feel you should be compensated then notify them of the mistake and write a complaint , take them to small claims court, etc.
Although tbh I don't think you deserve anything more than an apology.