Outstanding balance

I went for an eye test on the 07.12.2019, collected my spectacles on the 13th at the same time I paid with my debit card the outstanding amount and the shortfall that the medical aid did not pay. Today 24.01.2020 they want to say I still owe money, how is this positive that one month later they claim I owe money. Furthermore I dont even see that I got the special free frame or lenses, my frames onky came to R180 but the total account is R1290