Alitalia

I am in a quandry.  Last October my husband and I were bumped from our flight from Rome to Boston and in compensation were told we would receive 1200 euro electronic travel voucher. I emailed the address I was given in February and received forms that we needed to fill out and send along with identifying information. I also scanned our tickets and set that as well - that was February 4, 2016. I never received any confirmation that these docs were received by Alitalia, and in fact I sent a couple more emails asking if they had received what I sent. I received a reply to my last email saying that they had not received anything and that I should  send it all again, this time to to a customer relations office in Italy. I was told before to send it to a customer relations office in New York City. It is now 2 weeks before the date we wanted to travel, the fares have gone up and I have heard nothing from Alitalia.  I have spoken to multiple ticketing agents most of whom  said they  could do nothing about the problem.  Two said they would call that office and that I would hear from them.  It has not happened. 
I am beside myself feeling totally powerless in this situation.  Does anyone have any suggestions?
Thank you      slh43