Poor service

This is my second review and still am not happy. When i took up the MTN contract with mondo i was told am going to start paying on the 25th of march R199.90. Firstly my data sim was not activated until the 23rd of feb that is when had to go to an MTN branch to get it done myself of which is was not informed i should . Now i found out yesterday because to my surprise my deduction didn't go through that i had an insufficient debit order on the 20th of feb amounting to R269 a question is what was i being charged for safe guarding an inactive sim card? So now my credit score is at risk. Again i have to spent extra money for someone's incompetence.