Recently I received a conditional offer from a uni with the terms of their offer being that I achieved the IB Diploma. I made it my firm and consequently I was emailed saying their had been a "genuine error" mistaking my predicted and real grades and that I wouldn't be given a place. I already received my IB Diploma (meeting the requirements of their offer) so I am in a situation where I really don't know what to do.
How can I appeal to the university?
Seems extremely unprofessional. While it may not be worthwhile to appeal, if I were you, I’d ask for feedback. How committed were you to this university?
If you already have the qualification surely the offer should become unconditional and not withdrawn?
I thought that once an offer was made, mistake or otherwise, universities were not allowed to rescind them. You should contact UCAS.
If you firmed the uni, it's not fair for them to rescind it and they shouldn't be allowed to do so.
The same happened to me last year. I wrote to the department that made the offer and explained. They had to contact UCAS to reverse the decision. Definitely worth it if it is the uni you wanted.