Mango Airlines negligence & lack of customer service

I am disappointed at the service and response that I received from Mango Airlines regarding my damaged suitcase after travelling with Mango Airlines on the 3rd of January 2021 from Lanseria International Airport to East London (JE791).

One of the wheels of my suitcase was damaged and completely removed upon landing in East London. Immediately after noticing this, I reported this to the baggage department at the East London Airport and subsequent to that I received an email from Zongy Ziqaza on the 4th of January 2021 saying that Mango is not liable for fixing any damages to wheels etc. She suggested escalating this further of which I did, and I still received a similar email on the 11th of January 2021 from Nondy stipulating that it is "normal wear and tear" and I dispute this because despite their terms and conditions, this is not normal handling of baggage and I regard it as mishandling and negligence on their part, especially because we have seen videos of how the load and offload baggage without any care. It's unacceptable that I now have a 3-wheeled suitcase that I might not be able to fix as I might not find the exact/similar replacement wheel for it because of Mango negligent staff.