false negative feedbacks

[Incurable]

hello everyone. atm i have 2 negative feedbacks.
1st from real buyer. i have some problems on the 1st day. but next day we have solved the problem. i want to change this feedback to neutral.
2nd from seller. he calls me scammer but I even don't know who is it. check it pls

 

[EpicNPC CM]

@xtremerr notified @insticnt notified

 

[xtremerr]

@EpicNPC CM yeah you can remove the 1st feedback i left him, cuz we did solved it the next day. ty

 

[Incurable]

hello again. how much should I wait to remove fake negative feedback?

 

[EpicNPC CM]

removed