Dissapointed 3rd year student

As a third year student, I am very disappointed in Regents lack of unprofessionalism and how they don't respond to students. I have been trying to just obtain an invoice from them since the 12th of February so i can settle my fees but day in and out i have to follow up and to date, no one is assisting me. I am so so frustrated and it doesn't help that they don't even have contact numbers where you can escalate these kind of issues to. If you are a prospective candidate thinking to register with Regents, don't they are an admin nightmare. Iam a professional trying to upskill myself and now have to deal with an unprofessional institution.