i am actually sad to read all this, i am so sorry! so unfair, how things turn out, now regarding the interview, was it not recorded? were you not given a copy of it, if so, why not? interviews are recorded on a general rule, ask for an audio copy.
again i am really sorry that you are going through it, you ll get a right to appeal, and i am sure you ll win it with flying colours, make sure whatever you have said it in here, you write/say that in your appeal, and make sure you ask them for a copy of the interview, anything your wife hasnt said, or immigration officer took out of context, contest it, its a norm in immigration to pull such crap, audio record should help you, and i would also suggest to file a complaint of harassment on the person who said and did all that to your wife, i hope it sorts out soon for you.
best of luck.