AM.co.za not honouring Warranty

I will never support am.co.za again. Within 6 months, my first laser tube start sparking. Needed to replace it at my own cost. Bought a second and got it installed by aim.co.za. 45 days later it start sparking and they refused to replace it. All installations including the machine was done by them, even the setup. There is no crack in the tube. Stay away from them! They are not honouring their warranty.