distgusting service rendered by vincent/heinrich/

i have had the absolute displeasure in dealing with Dion Wired Hyde park and namely Vincent mpeka the admin manager as well as Heinrich Willers the regional manager.i walked in yesterday with a defective bose speaker and walked out almost two hours later having been verbally abused by vincent whom acts with impunity as well as their regional manager heinrich whom told me telephonically \cool"when i told him i will not be purchasing from his group any further. this after i have spent R100k at their hyde park store . the lack of decurum"