Bad customer service

I am a client of cellC for the past 11 years and every time I am up for upgrade they have stories and I am not eligible for upgrade of the handset because of various stories. The problem started when I changed my banking institute, I called Cellc for almost every month to have my banking details changed but I was told that I have to go to a branch and have my details changed there, I went to the branch which demanded that I bring statements and all of sort, I did that but I was not helped because most of the time I went there it was about the end of the month so I was turned down and not help because their systems must update first before they can help me.

Besides all above my account is up to date I have been paying it cash in the ATM's before month ends because I was aware of their tricks.

Now that I am eligible for an upgrade they told me that I am not handling my account well and I do not qualify but my account with the has never been overdue or skip a date on a new month.

I am sick and tired of these *********** individual who are I pay their salaries on a monthly basis and besides my account is forever above R1600 per month because I use my phone for personal and business matters.

Please urgently assist me with an upgrade I am eligible for it and I am paying for.

Regards

Sibusiso Goodwill Nkosi ********** ********** 562080