Citroen never again!

I was in a accident with my DS3. I asked the repairer only to contact me when all the parts are there. They ordered the parts from Citroen Vanderbijlpark and according to them all the parts are available it will be delivered to the repairer the next morning. The repair confirmed with me and I booked my vehicle in at them. After a week of waiting the parts are still not delivered to the repairer. I started with my investigation and discovered that Citroen SA parts division does not have any of the parts available in South Africa. But the parts linked system with the Vanderbijlpark Citroen franchise show stock available. I phoned Citroen SA and they confirmed all above but the parts are nowhere to be found. After 2 weeks the parts arrived from France. Not everything. I am now waiting for one more part and as usual they cannot find the part?????? Why must we as client's be happy with a manufacturer that cannot deliver on there promises. I am the stupid individual that did not do research before investing in Citroen. PLease learn from my mistakes.