Samsung level u is working only while charging

I have bought samsung level u on 8th month of 2018 and now my headphone is not working sometimes like when I switch on or off, the light (red,blue) indicator is not working and also not connecting but when I charge it, the light indicator is working and while charging, if I on the headphone, it's getting connected to my phone.

So, i reached the samsung service center. They told, we can replace it but should not have any damage. But, i have damaged it near the rubber like the plastic have came out near rubber and fixed it with superglue. They saw that and said cant replace it...what shall i do now ? Or How to fix this problem ? Please someone help me friends