Sold vehicle without roadworthy certificate

In 2014 I bought a Peugeot 107 demi model from Woodmead. Last year I went to renew license and was told that the car was registered without roadworthy. I contacted Peugeot Woodmead only to find that they had merged with Fourways. I called Fourways and they basically were not interested in helping me. Unfortunately I was not able to pursue further as I had major surgery and numerous hospitalisations. So now I drive an unroadworthy car that was sold to me without a roadworthy.... I also don't have a license disk although I paid for the license. I am 63 and full time employed with no one to assist in getting the dealership to sort out the mess. I am disgusted with Fourways attitude and most definitely will not patronise them ago. Incidentally I bought my first Peugeot from Fourways!