It should be yours, you can have a look at your dogecoin wallet , the address you received the 1% dogeback is the address you get your hayekcoin.  you d better use coincontrol for dogecoin core wallet. Or use the Dogecoin lite wallet MultiDoge.
You can use the command: Listaddressgroupings in your dogecoin wallet  to list all your address used.
https://dogechain.info/tx/effb6ee925d556b5038fdf566ca157818b197484a65b404812d03cdbe2105dcb
DAJvi4ZVNRoM7XVcctN9NYwp26hBmjBrdr branched to two address: 1001 to the lootery and 1,469. to your address DQAsBss7uaLUS2dJF3BWnsorPcJJjEo4yy then you  bet 1000 again to the lottery
at: https://dogechain.info/tx/77c7ec25827639710d38c25a119d00073c6062bb8e0185862140909d9a23ab35
then the left dogecoins to this address: DBUWP9RMCZyUAZPE5nFpdvNCvoTkrPzqph

So there is no wrong to send hayek to DQAsBss7uaLUS2dJF3BWnsorPcJJjEo4yy and DAJvi4ZVNRoM7XVcctN9NYwp26hBmjBrdr

where the doge come where the hayekgo
Never forget to USE coin control for dogecoin core wallet
Step1 Start coincontrol  from settings->option

Step2 setup custom address from send:

If this address is the address you used to receive dogecoins, once you sepend dogecoins the left will send back to this address.
If u did not setup coin control, the coins left will send to a new address.  I hope you can under stand