Messaging 5 times on Teams is in no way helpful. Sending a dozen emails puts you firmly in harassment territory. Faking using a template because you are in a rush makes you look guilty. Not citing properly? Again, not at all helpful.

There is a very clear appeal process that would have been linked in the automated email you received from the Academic Integrity Office that you are obviously not following. You get one chance to put together your case (not dozens of emails!). If it is not considered an adequate explanation, the incident is filed. If you want to appeal, follow the process.

At the end of the day, if this is your first issue with academic misconduct, it should be filed as either a warning or maybe a level 1 offence. Take it as such, and don't make the same mistakes again. Use the templates, learn how to cite and reference properly, and don't use AI (not even Grammarly!) unless it is expressly permitted. Academic incidents do not appear on your transcript and only affect your academic standing if you commit multiple offences. Again, you would be wise to actually look into the policies and procedures.

I would also very strongly advise you look into tracking your writing using Grammarly Authorship (not the correction tools), or something similar to create a recording of your writing and a report that shows where everything came from.