Rammstein Donaukinder copyright

[Galleria monarc 0]

Hello guys, I hope everyone is doing very well.I have a situation and I need your help.Although I use rammstein music on Instagram all the time, but for first time"Donaukinder" asked for copyright and I had to delete it.40 hours of work for the video, so I need this music.no one else gives the same feeling so I need it very much.what can I do to use it on Instagram reels.can I buy it and how much is it.I need your ideas and suggestions (I searched a lot and I couldn't find it) music rights ( Universal music group UMG ) but i am so small for them :(