Appalling service from Mercedes Benz Upington

New Vaal Motors Upington, Mercedes dealership made no effort to replace an alternator on my ML 320cdi. for more than 10 days, in spite of repeated requests. i sourced a replacement as MB had none in the country. His lack of co-operation cost me R18000 in hotel and car-hire. They did stay open for me after hours on 28th May and assisted in getting me a hire car initially.