Horrible service! You need to pay the return, they need long time and don't answer in time.
In which country do you live?
Germany
Reply Mankung.com:
Dear Kevin,
We're sad to see you've had a bad experience with us. Unfortunately it is true that you had to pay the return shipping cost. We've responded to each of your mails the same day they were sent to us. As it is very busy lately, our returns take a little while to get done. Your return arrived with us on the 9th of March and your refund was issued on the 17th March. We apologise for your inconvenience. If we can be of any more help, please let us know.
Kind regards,
A. Hooghiemstra
Team ManKung.com