money grabbing ****bags

I recieved a settlement letter on 3rd December for the amount of R5267.64. which i paid in full in 3 payments, 2 of them of the 4th, and the last one on the 5th. Now apparently I owe more, because i didnt do it in one payment, on one day. The demigod/manager Charlene is now threatening further legal action. It is an absolutely pathetic attempt at money grabbing. I cannot believe how a company can get away with doing things like this. Ive paid in full, leave me alone!!!