IX35 rear coupling

I dropped my vehicle off on the 21st of June. The warranty approved the claim about a week later. Then RDG had to order the part, which they said could only be done via email to Hyundai head office and they take 48 hrs to reply. On the 7th of July I collected my vehicle as I could not be with out it anymore and they said I could use it while waiting for the part. I follow up almost daily trying to find out when the part will arrive with no clear answers. I sourced a part from Hyundai Boksburg but they said they cannot use them as they don't have an account with them. I tried to escalate the matter but this also just does not seem to help at all. On the 29th I was told that the part has arrived but with the incorrect wire harness and they should have the correct one the following Wednesday 4th Aug. I have received no call, I called and get told the same thing the wire harness is incorrect. Then I get told by two people they will call me back in 10 minutes and I'm still waiting?? I cannot believe how terrible this service has been!! Wonder if this will help??