ACCOUNT BALANCE AND BILLING

Called customer service about the billing on account, I was advised that I was not credited for a handset as my suspected. No proper feedback was given. I enquired about my billing again to be advised that I have been paying for 2 extra handsets for a year. I was credited with a R500 voucher for the inconvenience, then a week ago I call the customer service again as my balance was still high only to be told that I am still paying for handset insurance of phones that I do not have. They now in the process of another refund. My concern is that I have to check up on my account over and over again and be the co-ordinator on email to ensure that the business practice and billing on my account is correct. To date ,I have not gotten clarity on the refund to a handset that was returned. My balance and billing is incorrect. please rectify !!!