Grimefighter DOES NOT WORK - HANGS MY PC!!!

Dear Avast Team.
Would you kindly give me a refund on my Avast Grimefighter that I downloaded yesterday 02/02/2015.
How do I go about getting a refund as it clearly has issues and does not work!
Thanks

As has been explained 100’s of times already on this webboard…
Submit a ticket and have patience.