I have to apologize that you are waiting for an answer for a long time and you probably feel disgusted. I would like to respond to you very quickly, but he could not do it because I'm not good in English.
I'm sorry to keep you waiting for an answer for a long time and you still feel tired. I want to answer it, but you still can not do it because I'm not good at English.
I'm sorry to keep you waiting for a long time, and you feel tired of answer I would like to answer you soon but I cannot because I'm not good at English.