Unhappy with safair's vacancy application process

Good day

My question is regarding your recruitment system, for example, I app**** for a post, that was advertised on your website, well in advance, then when I received the reply regarding the particular post, I was told that my application was unsuccessful due to that particular post is no longer available, just explain that to me, according to me, I app**** well in advance, but now that post is no more available, according to you guys, it sounds like I app**** for that post after the due date, which is incorrect, o always check when the post is closing