Disappointed about warranty and service provided

My car was towed on the 5th of May because of the exhaust pipe that had fallen off while I was driving. Till today I have been given the run around as to who is liable for the repair of the part. Today I get a call and I am told that Renault SA refuses to replace the part and I have to fetch my vehicle from the service center. My vehicle has been kept at Renault Durban for the past 9 days and today I get told to fetch it and repair it myself.

The part in question was replaced in November 2019 by Renault Pinetown and to my understanding has a warranty of 12 months... It hadn't even been 6 months and the part fell off on its own while I was driving and now I am liable to fix it myself.

What is the purpose of a warranty in that case if within the 12 months of the warranty the people liable to repair or denying any involvement.

How on earth do they expect me to drive my vehicle in that condition. The mere fact that they came to tow it clearly suggests that it cannot be driven in that condition.

I am utterly disappointed and enraged by Renault SA.