Bad client service from Tangawizi motors

I visited the garage first week of February 2019 regarding my car repairs and was told the part will need to be replaced since the car is still under warranty and i was informed it will take 21business days for the replacement to be processed. Until today my car has not been fixed and i have not received any feedback from tangawizi(renault) as to what is exactly going on. I have been doing several follow ups and i have not received any detailed feedback except that they "dont know" when the part will arrive and their client care does not know. I am very unhappy about the service exeperience i got from Tangawizi motors(renault) and i wouldn't recommend it to anyone including my family,friends and colleagues.