The worst service ever Samsung/SSS cellular

I Have booked in my Galaxy frontier S3 watch for battery replacement which before I could swim with watch.. I received the watch back an went for a swim and the watch died.. Went back to them and they said oh yes the watch is not waterproof/resistant any longer, this only after I returned to tell them it doesn't work want to switch on .. The Manager Shamiel at SSS cellular in Cape town which is dealing with this simply does not get back to, He is never in store and never available to take a call... All I want is for my watch to be sorted out this has been going on for a couple of weeks. I could have taken the watch anywhere else, but THOUGHT its Samsung they will do a good JOB. everything but... I also tried calling head office also did not return my call. This needs to be sorted ASAP