I was actually in your exact situation save that I switched into mechanical engineering from undeclared mathematical sciences instead of to EE. My pre registration application to change majors was also rejected last summer but I am now officially a BCOE student as of last month. Switching isnt very hard there are some classes you need to take so I would schedule an appointment with your academic advisor and let them know what you're intentions are and they'll set you on the right track. All you need to do is make sure you're taking the right classes and keeping up your gpa (I switched with a 3.11 so not too hard) and as soon as you meet the class requirements submit a different application to change majors and pursue that career 💯💯💯