Do you guys know how long the LNAT customer service usually takes to respond to an email? I'm an international student who has a langauge-specific (Polish) character in their name which the system sees as invalid, so I can't register. I gave them a call and the lady on the line said to send them an email, but my previous attempt went unanswered and I need to resolve this quickly, since I need to sit the LNAT before the Oxbridge deadline