Bad customer service

I booked in a fossil watch at sterns keywest on the 20/11/2015,I was advised that it will 6 weeks Max for me to get my watch.I requested a quote before any repair could be done,1.I Didn't get my watch in 6 weeks as promised 2.they made the repairs without calling me for a quotation now I was charged R700 of which I wouldn't have agreed to it the consults called their Manager Malefu who refused to do anything about it after I told them I was writing this complaint she offered me a discount of R200 . the watch is still not functioning now the watch has to go back for repairs again after waiting for 2 months .this is the worst customer service ever .after all of this why should i pay for such poor quality of work.