still no update on my account

last week on the 24 finchoice deducted their monthly instalment, not knowing the next day I wanted to buy airtime I was told my account is in arrears, I ask for how much they told me 98 rand I paid 120 at fnb atm, then I sended them the proof of payment. to update my account I even paid them additional 200 to keep my account up to date. even today my account have not been updated when I want to buy air time it keeps on saying am in arrears I called the whole week and nothing was fixed they even sended me smses saying the problem was solves but my kwikserve still saying am in arrears.