Here is a more natural version: 

Yesterday, I finally got my hair cut to the length I want. Generally I go to the salon every two months, but this time, I waited three months because I have had a tight schedule lately and I couldn't go. Getting my hair cut is uncomfortable even though I have done it often, so I am not willing to pay lots of money, like 4000 yen or more, for a haircut. In Japan, there are hair salons which are as cheap as 1000 yen for a haircut, and they are called QB houses. Recently, I heard on a TV show that they are also overseas in New York. I was so surprised to hear this, because QB house is a local Japanese hair salon for me. Amazing, you know?

Also: I don't know what you are trying to say about a haircut being "so comfortable"? Maybe you mean the opposite, since you say because it is so comfortable you don't want to pay much? But saying a haircut in uncomfortable is strange too.

JUST A DIARY ENTRY ON Apr.21st

I would like someone to correct my diary entry( or to tell me the natural way of saying some things below. But I would be glad even if you JUST CORRECT my entry) I was wondering if you could do that for me, please?
JUST A DIARY ENTRY ON Jun.21st

Yesterday, I finally have my hair cut until the length I desired. Generally, I go to the hair salon after the day I have cut my hair last time passed two months. But this time, I waited just three months to do this, actually, I had a tight schedule these days and I couldn't go there. So, having my hair cut is so comfortable no matter how many times I have done this, by the way. So, I am not willing to pay lots of money, like 4000 yen or more, for having my hair cut. Speaking of lots of money for this, in Japan, there is hair salons which are cheap as much as you just pay 1000 yen for, and they are called QB house. Recently, I heard it was into overseas, New York from TV show. Then, I remember I was so surprised from doing this. You know, QB house is, for me, so local hair salon in Japan. Amazing, you know?