Mtn is *****ing from the starving

Since I upgraded my MTN account two years ago I've had nothing but trouble. First they supp**** me with a defective phone, then the consultants at store level delayed my request to have the phone tested in the 6 month warranty period. After the debit order didn't go through in time and my account was suspended, I requested that my debit order date be changed or that it be cancelled and I can make manual payments. I paid my account this morning and 10 hours later MTN deducts the same amount. That was all I had left for the rest of the month. After several calls all I had was "I'm sorry this happened sir but we can't reverse the payment. Call your bank." my bank charges me nearly 50% of the original payment and can't guarantee that the payment will be reversed. MTN sure picked a fine time to ruin my life.