Proofread needed

Hi, ..

I went to this cinema where I live, and I had a bad experience there. I want them to know what I think, in the hopes someone over there with authority could be listening. Thus, and since they accept reviews on their Facebook page, I think of posting the following:

"I did recommend your cinema previously, but now I feel it's an obligation for me to re-visit this rating/review page and correct things, as I believe those reviews and ratings are both, one's responsibility and credibility.

I came to your cinema on Wednesday, 23/8/2021, for the 4;00pm showing of Suicide Squad 2, and it was simply disastrous inside the hall. The amount of noise and flashing mobile phone lights that filled the space from minors who shouldn't even be allowed-in in the first place as the movie is rated "R", rendered the occasion simply a classroom inside of a school. 20 or 30 minutes into the movie, and I just gave up: I got off my chair and simply went out and left the cinema, pitying myself over money and time wasted for nothing. I'm really disappointed in you."

Is it fine as it is? Do you think I should adjust/change anything?

Thanks in advance.