Changing terms of contract without my knowledge

Good morning<br> <br> I took out a new contract / upgrade with MTN in January. I have always been on the Top Up programme, but without my knowledge I have been put over to an Open Contract. As we have no wi fi in our residence, this has racked up a bill of R1 505.00. I have requested MTN (1) to please put my package back on on Top Up and also (2) to allow me to pay off this amount.<br> <br> They have ignored my emails, my pleas and all my requests. I'm frustrated and feel done in, to say the least, and completely exploited. I'm happy to pay off the account, but like I said, have received no response. This could lead to me being blacklisted and creating even bigger problems for me.<br> <br> Please Hello Peter, can you PLEASE help me. As a consumer I feel like i'm being held hostage with no-one to help me.<br> <br> Kind regards<br> Deidre Pearson