Dissapointing customer service

Requested a part for my vehicle, on 15/07/2015. Was informed that it will take 3 to 4 days to order as no stock was available, but I would need to pay upfront before they will order. (already a concern and bad service). I immediately paid the R2574.60 required and sent proof of payment. Today we were informed that the part will only maybe be available on 24/07/2015. This now after I have already paid and being without a vehicle for a week. Everytime we phoned Shannon, he said he will phone back with feedback...this never happens, and we would have to phone back (2 days in a row). My Hyundai needs to be repaired urgently as this is my only transport to and from work, but Hyundai seems to be overpriced on their parts and just do not care about customer service. Last week I also had to replace the pre-feed pump. Hyundai Strijdom Park quoted me over R5000 for this part. I then got the same part (universal) from Bosch for R385!