Please note that we do not really know whether you cheated or not and, technically, we cannot lift any VAC bans.
We have no direct access to Steam gamer profiles and are unable to enter your Profile to change its values, add or remove items etc. It does not work that way.
VAC Secure is entirely managed by Valve/Steam. For more information on VAC, head over to:
If in doubt, you can reach Steam Support by selecting a category that is not related to any particular game at https://help.steampowered.com
Alternatively, you can write to any of the following people from Valve, as they are all part of Valve's Support: https://www.valvesoftware.com/en/people