Take this seriously.
Did the doctor record the syncope and seizure in her chart? He may not have. You may be surprised. If not, insist that he does. Ask him to report this to VAERS. http://vaers.hhs.gov/resources/VAERS_Brochure.pdf If he refuses, report it yourself.
This is the MMR vaccine package insert.
I don't know how to make things better for your daughter, other than to suggest that she never be vaccinated again. Also, I suggest that you research high dose vitamin A following MMR. If I were forced to give my child the MMR for some unthinkable reason, I would give 200,000 IU vitamin A for 2 days following vaccination. This is separate from what happened with the seizure.
I hope your child is OK.