HammerHead True Wirless Pro Earbuds no longer work at all!

I purchased these earbuds back in 2021 and they have now stopped working entirely. Case lights up green when unplugged but nothing happens with the buds and they can't connect to the app or my device in general. I've put them on the charger and the case goes red, so I've left them on there until its green. After that I tried to pair them but then nothing happens like before! I immediately put them on the charger again and it shows a red light again on the case. I don't know what to do now, I'm out of the warranty period, and feel like I've just wasted money on these for how little they seem to have lasted.