Changing the conditions of a conditional offer

Good day,
I am applying to UK universities from South Africa. I have received a conditional offer from the University of Southampton.
However, there must have been a misunderstanding as my conditions are set on the IEB National Senior Certificate, which is only written by private schools in South Africa. I have gone to a public school and written the regular DBE National Senior Certificate. Both qualifications being more or less the same, as well as both being called a National Senior Certificate could have caused confusion.
I also have the condition of getting a 7 (A* Equivalent) in Advanced Mathematics, yet such a subject is not offered by public schools. Only a select few private schools offer this subject and the school must be registered to write the IEB exam.
I have sent an email to the University of Southampton's Admission Team to explain this context.
In the mean while I would like to know if it would even be possible for them to change the conditions of my offer, given this information?
And should I contact all my choices now to explain this context before they possibly make offers or is this most likely an isolated incident?

Good day,
I am applying to UK universities from South Africa. I have received a conditional offer from the University of Southampton.
However, there must have been a misunderstanding as my conditions are set on the IEB National Senior Certificate, which is only written by private schools in South Africa. I have gone to a public school and written the regular DBE National Senior Certificate. Both qualifications being more or less the same, as well as both being called a National Senior Certificate could have caused confusion.
I also have the condition of getting a 7 (A* Equivalent) in Advanced Mathematics, yet such a subject is not offered by public schools. Only a select few private schools offer this subject and the school must be registered to write the IEB exam.
I have sent an email to the University of Southampton's Admission Team to explain this context.
In the mean while I would like to know if it would even be possible for them to change the conditions of my offer, given this information?
And should I contact all my choices now to explain this context before they possibly make offers or is this most likely an isolated incident?

Good day,
I am applying to UK universities from South Africa. I have received a conditional offer from the University of Southampton.
However, there must have been a misunderstanding as my conditions are set on the IEB National Senior Certificate, which is only written by private schools in South Africa. I have gone to a public school and written the regular DBE National Senior Certificate. Both qualifications being more or less the same, as well as both being called a National Senior Certificate could have caused confusion.
I also have the condition of getting a 7 (A* Equivalent) in Advanced Mathematics, yet such a subject is not offered by public schools. Only a select few private schools offer this subject and the school must be registered to write the IEB exam.
I have sent an email to the University of Southampton's Admission Team to explain this context.
In the mean while I would like to know if it would even be possible for them to change the conditions of my offer, given this information?
And should I contact all my choices now to explain this context before they possibly make offers or is this most likely an isolated incident?

That's great, congratulations! I applied for BSc Mathematics with Actuarial Science.