Hacking coinpayments Wallet is no easy job ..
I think this is something grave since coinpayments is more or less Preety secure ... But day to day we are hearing news like these and the biggest companies are getting robbed thus I think the hackers might have something new that we know nothing about. It's scary to think like that but I think you should try..to locate the wallet address and then check out and register a complain if possible.
My condolences
Take care dude..it's hard earned money ..