Garageband won't open anymore (OS 13.5 or later which I can't download)

Hi there.

Super upset because garageband suddenly won't open - says this app cannot be opened.

Checked updates and found that garageband is now only compatible with OS 13.5 or later. Tried to update my software but found out that my macbook pro 2016 is too old now apparently.

I'm absolutely distraught because I'm a musician and I have half of a new album on there that I now cannot access. Not to mention I use garageband for my freelancing work.

Please help me, I can't afford to buy a new laptop and I need my songs :(