Ugh! Well I checked my credit card online today and UA charged me the full price of the ticket. So I had to call and get my $300 (the value of the vouchers) back.
It took over 45 minutes, but the agent finally claimed they worked it out. Glad I had taken digital scans of the vouchers ^
They're saying it will take 7-10 business days to get my money back. We'll see