We recommend you sending a screenshot of the plot id and what blocks have appeared outside the plot and send the screenshots to an admin+. If you are unable to contact an admin+, ask a staff member online to help report it.
Hope this helps and good luck getting the blocks removed!
I will be able to come on and remove it for you in about 2 - 2.5 hours, but you can also ask Nakir or Ecoya when you see them on.
EDIT:@WatzGoinOn What is the exact username? I've tried the username you gave, 'The_Only_AlfaAlfa', but it didn't work. In fact, it's not even possible to have that username because it's too long. I've also tried some names similar to that username but I couldn't find the right one.