NONSENSICAL SERVICE, EMPTY PROMISES, INCOMPETENCY, PATHETIC SERVICE

i have been a customer from 2015 i have never claimed or anything, i have only called recently asking for an upgrade, i was told my account is in arrears i asked the lady when you debit the monthly fee please include the outstanding amount she agreed but never actioned it i called the following wanting to do the upgrade because according to me by now the amount has been settled as i have communicated but to my surprise it wasn't i was put on hold for the longest time i can remember with no assistance, i called again in three to four days asking for an upgrade the guy told me you owe us we cant action it i explained i have made arrangements twice now with no action can i get some assistance. you send emails to this people they don't respond so i ended up sending a very long email asking assistance and also said if you not willing to assists me please assist me with cancellation , cancellation email was received four days later but all other queries were not actioned wow. i then decided to go to a small office here in pretoria i was assisted by a lady who called the customer services the guy by the name Gwanda from finance promised to action it, he said he will arrange for money to be debited and he will call me today @ 11: 30 to do an upgrade but he hasn't done it, i called again a lady said we cant help you because your account is cancelled because you owe us. YOUR SERVICE IS PATHERIC TRY TO GET MORE COMPITENT PEOPLE WHO ATLEAST WILLING TO WORK.