MTN blacklisted my phone for no reason

I bought a iPhone 11 from Takealot in December 2020. I am a Vodacom user. In August of 2022 my phone stopped receiving service from any of the service providers. Long story short, I found out that MTN blacklisted the phone without my consent and for no apparent reason. I've sent multiple emails end provided an affidavit and photos, and documents but to no avail. I am tired of trying to get this issue resolved and if this post does not resolve this issue, the next step is to sue MTN. Trying to call their customer service is a joke, and the unwillingness to help by their representatives at the outlets is shameful.