Failure to keep to contract

In February 2015, I complained about the bad service received regarding my billing for the Explora. After a month, it was sorted out and in March, I was billed R 99.00. In April, low & behold, despite a letter from their Operations Manager stating that there will be only R 99.00 deducted, I was debited for R 149.00. So disappointed and what a *******.