No, NOT hackers... you've simply sent FROM Kraken to an address in your Electrum wallet... What you need to do now is actually send the coins FROM Electrum TO coinpayments.net.
I'm not sure why you thought you needed Electrum to send from Kraken to coinpayments.net?

The OP has not been back here for a couple of days, maybe he realised his error and rectified it but would have been nice oif he posted here to let us know how he got along