1.) this country is fked, yes, but someone cant say "he assaulted me" and you have to go to court for it. there has to be either an eyeball witness, marks from an assault or some other evidence to incriminate you. if this wasnt true, i could walk outside to my neighbor i dont like, say he assaulted me, and have him taken to court.
2.) the situation you're in now... i would call the phone company and have them held liable. speak to the highest person you can immediately, ignore front-level reps. get a sup or manager and explain to them the situation and have them forward you a signed statement saying that they deleted your voicemails which were your evidence in court.
3.) fk the police. i hate them, with a passion.