MTN unfair treatment!

So, because I got ****med in December and airtime was bought on my account, MTN has decided to totally block my account because I refused to pay them R2500 instead of my normal R302.02 monthly payment. So now I'm sitting with an iPhone 6C I can use as a paperweight. My contract expires on 13/02/2022. This was reported, but nothing was done about it. I stay in a security complex and my phone number is coupled to the gate, so I am basically stuck at home.