How to undelegate my hives?😡😡😡

Hi everybody,
Before the fork, I had delegated de vast majority of my steem power too Hive account@boomerang. I've just realized that I'm not receiving my rewards from Hive account@boomerang.

Please, I need your help to be able to undelegate my hives. I have tried to undelegate my hives through peakd but it doesn't work.

If you know a good delegator I would appreciate your help.

Best regards,

Hive account@ayusor