MTN is failing me as their client

First they dont debit my account for August, no one says anything to make me aware of any technical errors they had, now 2 days before my debit I'm send an SMS that I will be double debited. I reversed that payment because it is not my problem that you guys failed to notify me on time, 1. My insurance e for my car bounced because of negligence from my service provider that I have been with for years now. 2. I'm send an SMS today that should I fail to pay I will be disconnected. My question is why should I be inconvenienced because I was In the dark, money was available I have authorized a stop order on the 25th every month. I will not pay August it's not my fault that you had a technical error. Should my services be disconnected I will cancel these contracts and port out. This is not how you treat a client let alone any living being. We budget and have responsibilities so you deciding to double debuting my account dont you think it's going to impact me negatively with my other debit orders? I will make an arrangement and pay September and October however August I'm sorry that's not my baby and I would like it waived. I will not posting, this is my second complaints this year and Ive had smooth and great services for years. I repeat I will not pay August this is so wrong I am really an unhappy client.