Poor Service from Bosch

I purchased my Bosch gas stove in November 2019 at Takealot. On the Sunday I experienced some noise 17th Nov and reported to . On the 18th Nov I reported to Takealot. Takealot sent me an email informing me of the procedure. I had to contact Bosch directly. I contacted Bosch on 27 Nov. I had received 3 dofferent references nos. The technician phoned on the 3rd Dec and said he will call when his on his way. After that I emailed and phoned Bosch on the week of the 10th dec again. The technician came on the 17th Dec and informed me he had to order a part. On the 19th Dec I eceived a reference no informing me that the service has been completed. I phoned Bosch no one can give me answers as to when the part will be available and when will the stove be fixed. I have to use a small gas tank to cook on and its unacceptable as it is a new stove and has to endure the poor service of Bosch.