Please help me improve the following sentences!

[chowbarry]

Please help me improve the following sentences!

I am sorry to inform that as I was very busy during the whole of October 2012, I submitted the application for overtime allowance on 02.10.2012 as late as 02.11.2012. I hope you can accept my request for back-paying the above-stated overtime allowance. Thank you for your assistance!

Thank you!

[Gillnetter]

Please help me improve the following sentences!
(There is no need for an exclamation (!) point here, a period will suffice)

I am sorry to inform that as I was very busy during the whole of October 2012, I submitted the application for overtime allowance on 02.10.2012 as late as 02.11.2012. I hope you can accept my request for back-paying the above-stated overtime allowance. Thank you for your assistance!

Thank you!

I am sorry (Why are you sorry. It doesn't seem that you are guilty of anything) to inform that as I was very busy during the whole of October, 2012. I submitted the application for overtime allowance on 02.10.2012 as late as 02.11.2012 (I do not understand this part. Did you submit the application on 2/10/12 and every day thereafter until 2/11/12? Could you mean that you submitted the application for 2/10/12 on 2/11/12?). I hope you can accept my request for back-paying the above-stated overtime allowance. Thank you for your assistance!.

[chowbarry]

Gillnetter, thank you!