подскажите пожалуйста как будет по английски- вопрос внутри...

Without giving reasons I was requested to write a letter of resignation.
I have no idea why I was told to leave. I wrote to you on the issue in October but probably due to communication problems you failed to receive my letter. I hope Victoria will explain the real reason of my dismissal.

I was asked to write the statement of(в предлоге не уверена) leaving at my will, I don't know why(I don't know what reason it's)
I don't know why they asked me to leave my job. What a pity(I'm so sorry) but i wrote you about it in October, possibly there were some problems with connection and you didn't get my letter. I think Viktoria will explain you real reason of my leaving.
P.S. С временем не уверена) А так всё)

I was asked to write a letter of resignation on their own, cause I do not know.
I do not know why I was asked to resign. I'm sorry, but I wrote to you about this in October, apparently there were problems with communication and you have not received my letter. I think Victoria will explain the true reason for my dismissal.

I was asked to write a letter of resignation on their own, cause I do not know. I do not know why I was asked to resign. I'm sorry, but I wrote to you about this in October, apparently there were problems with communication and you have not received my letter. I think Victoria will explain the true reason for my dismissal.