Bad attitude and poor service

I bought a speaker and returned it because it stopped working, I was 3 days late for the Guarantee from Musica themselves and they said I have a further 6 months with the supplier. I was told to leave it there and they will let me know what's happening later that day. I waited more than a week and heard that they are still waiting for the supplier. It is now more than 2 months later and I went to the store just to hear that there's nothing that I can do or that they can do and that they'll leave me there waiting the whole day because they I can't do anything and while I was in the store I was told to call the guy that helped me the day I brought the speaker in and he just puts the phone down in my ear and stopped answering after the first try where he put the phone down.