Extremely bad service Renault SA

I have ordered a left full control arm from Renault Midrand,some 4 weeks ago. estimated delivery time was given as 3 weeks. (15 working days) . Now the kind people at Renault midrand did update me that the part has arrived, but their head office Renault SA will not deliver it or commit to a delivery date. This has left me stranded and extremely unhappy about the brand and dealership. will anyone who still has a single GRAM of customer service at Renault SA fix this mess.