I would like anyone to correct mistakes in my message, please?

Dear _____,

I am writing to inform you I have received a message from your office containing this text below
Please find your speaking test date and time below.
Please report to your test venue, ELS (see attached map) 30 minutes before the scheduled exam time.

Please note this date and time are final and not subject to change.


Date: 10/12/2012 Time: 11:40:00 AM

As long long as my major test date will be held on 10/13/2012, I would like to inquire whether this date (10/12/2012 ') is the time of my speaking test or is only to plan to choose any other date after the major test.

If so, I would like to say that I have registered to the test date which will be held on 10/13/2012 and have a receipt with this time. Also, I didn't receive any notes telling me that my speaking test will be held before my major test.

As far as I know that I have two time periods to complete my whole test( one is for all the three skills and the other is for speaking). Also, I am expecting that the date of my speaking test will taken place two days later after my test for the three remaining skills(Reading, writing and listening). So, I am quite surprised.
As a result, I would respectfully like to say that I will only attend to my test in time. Besides, I think that I won't have to attend this time date '10/12/2012' as long as my test date will be held on 10/13/2012. I might respectfully like to say that you have your own rules, which avoid you to reschedule the test dates of candidates and from the same same direction candidates also have their own rights to attend only in time.