Ticket Refund

Hello,
here my complaint. Last summer I bought 3 tickets for a round trip Fiumicino-LA and Sand Francisco-Fiumicino. The provider was Cheapoair. A few months ago, I received an email from the company stating that Alitalia had cancelled one of the flights and that they had selected a new flight WITH 6 HOURS OF LAYOVER! I called Cheapoair and spent one hour on the phone before the agent told me about the possibility to get a refund, if I did not want to fly with Alitalia. I asked them to tell me the exact amount of the refund and am still waiting to know how much it is (somebody said they could not tell me, somebody said it was going to be the total amount, somebody said the half. I called them three times, chatted with three people (and saved a copy of the conversation), and sent an email to the billing email address, but no answer after a week. As a result the scheduled (and PAID) flight to Fiumicino leaves tomorrow. I am obviously not going to take that flight and at the same time I am not sure how much Cheapoair will give me back and when. In practice, I was forced to do a blind transaction...I am looking to an effective way to take them to court. I think what they are doing to me is illegal and, even if I stated that in my last email, they have not replied yet...