So you are still ignorant of forum rule that forum do not ban for account buying and selling?
Accumulating 800+ activity without reading rules is quite an achievement.

OP you are neg trusted, that user is neg trusted and your campaign manager is also neg trusted, quite a good team there.

I feel the personal jealously here but did Campaign manager accepted the request of change of BTC address without verifying the signed message from previous campaign payment address?

If that participant did not requested any change in payment address then campaign manager is not in fault as such though he should act.