Looking for a Facebook Page Auto Comment Bot for Posts

Hello, I need to be able to automatically comment with a photo to upcoming posts on a specific facebook page at the exact time the post is published, preferably with multiple accounts, hopefully, someone can get back on whether this can be done, probably with a python script. This is for a contest that is currently running in my country so since it's for a one time use I'm also not really looking to invest a lot of money into it, but I'm open to quotes. Hopefully, we can work something out, thanks.

I can do this for desktop app. It can support multi accounts