Mistreated

I have been with MYN South Africa 🇿🇦 for more than 10 years using the same number within their contract but keep on upgrading on it. So this year January it’s happened that I did not pay in time and my line was block while I was still on that when I called to make an arrangement they told me that my account is on areas of R7000 and I ask them how is that possible they told me since October 2023 I have been not paying on time I asked them how so because if MTN did not deduct the money they will sent a text message telling me how much I needed to pay and I paid the amount now the 7000 where is coming they said it’s areas I was like ok I will pay as soon as I paid I think I paid 2000 they open the line because now I saw that 5000 is a lot let me make an arrangement to pay the R2000 every month yes they agreed come march 2024 when I have to pay. So I get paid on the 15 of every month on the 16 march 2024 I paid the agreement amount of 2000 only to find out my line was close I called them guys what happened to out arrangement now they said no the line was not even supposed to be open before I can even pay 90% of the money that is been owned I was so shocked 😳 firstly me and MTN we had an agreement that every 15 of the month they will deduct they money if the 15 it’s on the weekend they day before but that since last year 2023 had changed and now everything is my fault. So since my last payment in march my amount owed is close to 9000 now am asking myself how is this possible and how am I going to pay this amount now at that time am studying and I need connection to the internet 🛜 it’s so difficult I don’t know what to do please if anyone know how to make an arrangement with MYN South Africa 🇿🇦 please assist me I need help R9000 it’s a lot of money to pay in cash at this point and I need internet 🛜 for my studies please 🙏