Unhappy customer due to poor service

A month ago I bought a car from Inspectacar Gezina, and on the day I collected my vehicle they didn't have the spare key ready. I was told to return 2 days later for collection of the spare, but still nothing. Today marks 5 weeks since we got the car, but no spare key. We've been following it up weekly and we still don't have a spare key for the car. We've been getting all sort of excuses and being taken from pillar to post to no avail. The sales agent that assisted us said he'd deliver the keys to us, but now wants us to go to McCarthy Toyota. Isn't it the dealerships responsibility to ensure that they do all the running around instead of us as clients? It's completely unacceptable the kind of service we've received.