Translation of respektlos

I hope you could understand my last letter to you. You see, when I write in Spanish I am not very confident. I always question myself and each and every sentence takes about fifteen minutes.
I have your letter sitting on my desk. But, in the last 2 months I have been working on some projects which were very time consuming. I will not be able to start anything new before October or November.
I am glad for your help. I am sending you additional codes in the attachment. Please remove all codes that are without mistakes from the document and leave just the codes where you made changes.