Reluctant after sales service

I bought a vehicle from Renualt Centurion. Although the vehicle was bought second hand it's still under factory warranty. The vehicle was delivered on 5 January 2024. After having the vehicle for a day alot of faults was found on the vehicle I informed the dealer of this. They sent me a courtesy vehicle and left with my vehicle to repair the faults mentioned and everything went well with this. The lights did not adjust so the replacement part was on back order. The salesman was reluctant to get back to me on this issue. I then called the second hand manager and there was some communication but it did not resolve anything. I later called the DP and things started moving but only till such extent. After struggling to get hold of any one they said the part will be couriered to the dealer closest to me as it is a warranty claim. Friday afternoon I received a call from the courier to deliver a parcel but seeing they are supposed to send this to the dealer I was not in town and had to make arrangements for the parcel to be received by the courier. So I am sitting with the part claimed via warranty and no clarification is given to me by the dealership on what to do with this part. Please advise me on this I have been struggling with this dealership since 5 January. My frustration level as beyond explanation.