Poor customer service

I have never dealt with an institution like Regent Business School, I mean just to get a tax invoice it takes more than 2 weeks and I am still waiting. My deadline is tomorrow and nobody, I mean nobody from Regent has bothered to come back to me. The last person I dealt with was Thando and s/he was very helpful until they also disappeared. I am very frustrated, honestly I was looking forward to it but I don't even think am still willing to study with them.