Hello Rasklart. We helpers cannot really do much about this since we have no power to do such things. Regarding your account I am pretty sure if you do an /assistance IG asking an admin to disable your account he will do it for you. Although I will be marking this for an admin so he can help you with your request. Good luck with everything.
Re: [Admin]Can my forum and UCP account be deleted?
I am very sorry to hear that you've decided to leave our community. However, I believe you've made that choice for your best and I wish you good luck further in your life.
In addition to Escaper I'd like to say that you can also request the same via the Master Account support ticket system. I believe you know how to get yourself there, but in case you don't, please inform us in that thread and we'll help you as soon as possible.