Yes, I couldn't agree more. I emailed you several times, sent Facebook messages and messaged on Whatsapp and got no reply. You're sending business to your competitors!
An admin assistant, which can't cost that much in Poland, would be of great help for you.
It would also allow you to concentrate on training and not on communicating with potential students which could help you increase profits.
I might even be in Poznan right now if it weren't for the lack of communication.