Existing client new aplication duration

This is the second complaint that I'm posting in a week because I'm just astounded by the poor service that I have received. I app**** for a data contract on 27 November, however to date the application is still pending. There was absolutely no communication from MTN for a week following my application, not even an sms. I followed up and eventually I was told that there are documents outstanding. 2 days after submitting those documents, I'm still waiting. Black Friday is not an excuse for poor customer service. Adequate provision should have been made for the influx of applications. I have been an MTN client for 10 years, never missing a payment. Surely it shouldnt take this long for approval? One just wonders, is there need to continue looking for new customers when existing ones cannot even be serviced satisfactorily. Whatever the case may be, it has certainly left a very sour taste in my mouth and I will be taking my business elsewhere in future.