Never purchasing another Stellantis vehicle

I took my 2022 Opel Mokka 1.2GS Line in for a service on 26 Jan 2024. Around this time, I enquired about the brakes. Subsequently, the service advisor submitted a claim from my maintenance plan and it was approved on 12 Feb 2024. However, up to this day, I am still waiting for the fitment of my brakes. Apparently the parts are not available in South Africa, with no estimated date of arrival. I cannot even drive the car because it is unroadworthy without brakes. I called Stellantis customer care and they were not very helpful either. Who else can I speak to?