MTN Not communicating and honoring my request

28 May MTN Wonderboom junction new contract value R379 pm. Asked sales consultant limit account to not exceed the R379. 7 Jul Debit order of 1,308.02. MTN Menlyn confirmed no limit was set. They set limit. 7 Aug Debit order of 3,415.93. I reversed debit order. MTN call center to request debit order be cancelled, they could not assist, said I should speak to Wonderboom. 15 Aug Customer Care confirmed debit order cancelled. 17 Aug Wonderboom consultant shouted at me. I left without any banking details, she refused to help me. Account suspended, was informed account been handed to collections. No communications from MTN collections. 4 Sept Wonderboom junction I requested detailed account to indicate data used. Consultant said she understands my frustration and would phone and email me within 7 days. No communication received. I don't want any business with MTN. MTN customer since 1999, will take all contracts to other providers. I have never experience such bad 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.