Kindle Fire App Bug Fixing

Hi, I have developed a small Kindle Fire app. But currently there are a couple of bugs. My client mentioned that ads and IAP are not working properly and sometime the app crashes. The problem is that I can not sort out the issues on my side because I don't have a real Kindle Fire device. (The app works good on my Samsung device.) So I am looking for someone who can fix these issues with full test. (The candidate must have the Kindle Fire device.) No upfront, there will be released money after my client approve the app. Please start your bid with the word "Feburary".