Complaint

I have an account with this company since last year April, I bought pots from them. They were deducting R201.75 from my account. On the 30th of September 2020 they deducted R175.25 which was the settlement amount. I called them at the beginning of this month to enquire about my delivery of pots as I have paid up the account, they told me that the delivery will be made with 14 days working days. Yesterday I called again to enquire about the delivery they told me that I have outstanding R9.00, which i don't know where it comes from. Why do they wait for me to call them. I paid R3500 for my pots but now i have to be stucked by R9.00. Please help or else they should pay back my R3500.00 and stay with their pots.