HiFi review: bazooka speaker defect

I bought a bazooka speaker at hifi Corp. It was not supplied with a cable to charge it. So I used my own. Somehow the charging port got damaged. Upon taking it back to them I was told that the damage is my fault. I only realised that a cable should be supplied as the person asked me where's the charging cable upon me returning the speaker.I was quoted an amount of R375 for repair to speaker