Not following instructions to limit account usage

In May 2015 I opened a new contract at MTN Wonderboom junction. The contract value is R379 per month. I instructed the sales consultant, Emorge, to limit this account to not exceed R379 per month. <br> Month 1, a debit order of R 1,308.02 were deducted. MTN Menlyn confirmed no limit was set on account. I requested again the limit of R379 and this was done. <br> Month 2, debit order of R 3,415.93 were deducted. I stopped debit order and logged a dispute.<br> The sales consultant at MTN Wonderboom junction shouting at me in front of other customers in the shop when trying to resolve the issue. I left the shop without any assistance.<br> The account has been suspended and I was informed the account has been handed to collections. To date I have not received any communications from MTN.<br> I am absolutely not interested in doing any business with MTN in future. My family has been MTN customers since 1999, but we will take all our contracts to other service providers. I have never in my life experience such bad level of service, not to mention the humiliation of being shouted at by MTN staff. I am disappointed in MTN and will do my best to prevent everyone I know to not do business with this company.