MTN Deactivated my account

I have a problem I open a mtn contract on mid March 2021 the started paying on April via debit order, but I had a problem with debit order because their system was bad in a way where they will say they received the payment where's in my bank account didn't went out so i went to mtn store Irene mall centurion to change payment method to cash every 1st of the month i pay cash and i received confirmation SMS that it was changed to cash so I've been paying well till November 2021 i missed a payment then they disconnected my account .On month end November 2021 i paid double for November and December 2021 I asked them to activate my phone they told me different stories ,and I also noticed that they invoiced me R16 974.55 i asked why firstly they said its an error on their system they will fix it that was on the 4th of December 2021 i even went to Irene centurion mtn store to ask for help the guy(employee)said he doesn't see anything on his system my phone is active ,i gave him my phone he switched it of and on and gave it back to me he said i must call 135 coz he cant assist me. On the 17 December i called again 135 sending inboxes to them they told me that my contract was cancelled without a notice and they handed me over to legal department to settle R16 974.55 I went to Quagga mtn store again to look for assistance and that lady showed me that my account was never changed to cash it was still on debit order method and it reflected as if i was rejecting payments i told her that i received a SMS confirmation of paying cash its not my fault that mtn system failed to change it to cash I showed her the sms and she said i must call 135 they cant assist me(Screenshot)Ive been emailing to mtn legal department trying to dispute that R16...... coz they cant cancel my contract without a notice and and hand my account over to legal without a notice now Leseba from legal department said they will hand it over to debt collector's soon. I've been explaining and telling them i want to continue with the contract i never cancelled any contract and I'm not in a position to pay R16k Leseba and Joe Jacobs from legal department said they cant reactivate my contract it was terminated i must settle the R16k for activation of my account.I sent Leseba receipts of all the payments coz he said my contract was cancelled because of Arrears and he insisted that it cant be reactivated but it can only be changed to pre-paid and i must pay R2k and something monthly to settle my account. My phone is still not active coz mtn want me to pay R16k because of missing one month November which i paid later on its not like i dodge that November and they cancelled my contract without noticing me😭😭😭😭💔💔