@safi38,
I gather that English is not your first language.
Have you ever taken advantage of tutoring and help with English and with the rest of your studies? If you have not, then you need to indicate in your letter that you are going to if reinstated, and here are the steps you have already taken (and list them).
Don't just vaguely mention them. Give specifics.
Here's the deal. Academic institutions see people like you all the time. It's not that they are unsympathetic. It's more that they have heard it all before. Furthermore, if you do not tell them how you are going to fix things in the future, then they know you and they are going to be in this exact same place a year or six months from now. While taking more of your tuition money is appealing to a lot of colleges, the people behind those colleges tend to be nicer than that.
They want you to not be wasting your time. But they are not responsible for your happiness, your ambitions, your organizational abilities, or your resourcefulness. They will help you if you ask, and if you show you are trying to improve things.
Show them how you are changing.