So you are no longer able to appeal your ban?

Solution:
https://steamhost.cn/steamcommunity_com/groups/tf2outpost/discussions/0/558747922562007365/#c540742485382216907

In case you are no longer able to appeal a ban (its associated ticket has been closed), you may email our Head Appeals Admin, ♥HelenAngel♥[www.tf2outpost.com], at helen@outpost.gg and explain in detail why your ban should be removed. Note that misusing this opportunity may also eliminate any chance of appealing this ban in the future.

Dat necrobump.

It happens when Steam is under very heavy traffic, therefore the system may not be able to connect to the Steam group that verifies you are a member. Hence why you may lose your extra trade slots. This is likely happening due to the Summer Sale and is only temporary.

I dont think you can request VIP.

Originally posted by Currier Bell:

VIP's are just as the name implies, they are very important people that are not members of our staff. These can include past staff members who have moved on from the position after a great deal of time and effort given, important members of other related communities that deserve recognition, or someone who has just done something to positively impact the site enough to warrant the title.

https://steamhost.cn/steamcommunity_com/groups/tf2outpost/discussions/0/864971658468769910/

https://steamhost.cn/steamcommunity_com/groups/tf2outpost/discussions/0/540744475408420771/

No trading on the forums.

Report it to Valve.

Clear your cache.

https://steamhost.cn/steamcommunity_com/groups/tf2outpost/discussions/0/558747922562007365/#c540742485382216907