Payment not settled on my account

Ive made two R200 payments from FNB and Nedbank on the 03 October 2017 and only one was settled ,The FNB one reflects on my statement but the nedbank one doesnt,ive been asked by a S.Buekes and a Louise Van Wyk to send proof of payment countless times but still the payment is not settled.Ive been phoned by countless call centre agents asking me to pay and when i tell them whats going on they say they gonna note it but when the next one calls its the same story again.Now ive been receiving threatening sms from Homechoice that i must pay to avoid legal steps and interest costs.How can i continue to pay when certain payment is not settled on my account.This has hasnt been resolved for a month now.