Shortened to two weeks
If you needed to leave for any reason, you should have said that to staff at the time. If there was no significant roleplay occurring for a while, you should have also stated this to staff. Instead you lost your temper with them and deleted the character in frustration and sheer avoidance of all roleplay.
However, seeing as this is your first offence and have accepted some level of your own fault, the ban will be shorted. The ban will remain on record and your other character will remain PKd. Take this time as a mental break and a chance to reflect on the rules.