Poorest Customer Service by an Educational Organisation

So it appears that my understanding of "Priority" and yours are two very different understandings. At 15:14 last Wednesday, I sent the email to the address you provided me with. 3 working days later and I have not even gotten so much as a, "We acknowledge you email". It is truly infuriating and unprofessional. I have had dealings with an educational institution who is in Canada, and even they have the decency to respond to queries, actually address the queries I have and resolve them, and best of all, they do so in under 2 hours of me sending the email. I honestly do not know what to do anymore. You apparently do not have a call back system, your support staff cannot or will not answer my questions, your Student guides do not respond to their emails, and your priority support seems to be just as efficient as your Student guides. If this is how you rebuild a person's trust and faith in you, then I don't know. Out of sheer desperation, I even tried your Facebook Messenger, and once again got no response. All I am asking is that somebody get back to me to resolve my queries. Seeing I paid you for an entire years subscription, is it really too much to ask?