Worse customer service experience from mtn ballito junction

I took a contract with mtn 1 year ago. Long story short last month they didn't debit my account and they send me an sms stating that the account was moved to cash without my consent. I went to mtn on Monday of which they stated they will redebit the account the same day. The debit order has not yet went through and now they deactivated my number. This is the worse service I have ever recieved from mtn in ballito junction mall. I use my cellphone almost for everything, I can't seem to do anything because I can't seem to access anything from it. It's there error that they didn't debit my account and now I'm the one suffering from there incompetence