Victim of online Fraud

My wife recently passed away in June 16 2018. I’ve been struggling ever since her loss. I was friend requested by a celebrity on Global  a week ago explaining how his life was changed when he received his UN Grant all I had to do was wire $3,120.00 via Western Union and they would issue me a cheque for a $150,000.00 USD. I thought to myself this to good to be true. So asked the celebrity (That I thought was the celebrity but found out someone has hacked this celebrity Facebook account) what makes you so sure I can get this UN Grant. He replied that he received his and his friends received theirs as well. I was reassured this was all legitimate. When I paid the money they contacted me two hours later to tell me that the IRS in my state was holding my grant and will release it once I paid all the fees. The fees came up to another$8,500.00. I knew something was wrong and I contacted the Edmonton Police Service and reported the incident. I’m on a disability pension and have very limited funds to survive. This has devastated my life.