Reap off by Lewis Store

If I can give zero star I would. I am deeply saddened by Lewis Store. On the 7th of July I called to ask for a record of payment. Noni from Lewis store sent me a record of payment showing I have paid up to R15 868. On the 8th of July I went to Lewis store to pay R1700. My purchase contract details my total repayment amount is R17 556,48 and I have paid the total amount. However, Lewis store still says I owe R504,62. I sent Noni an email about this reap off and she never rep****. I have been a good customer. My monthly installment was R487,68 and I was paying R500 instead and I replayed all amount owed on time but Lewis store still wants to reap me off . I am deeply saddened by the service from Lewis store and lack of honesty from staff. We work hard for our income. You make a purchase but when it’s time for them to close the accounts when you have paid all amounts they keep on adding amounts that are not true and not reflected on the purchase contract.