Account payment.

Good morning my name is Ntombifuthi Radebe I have pick n pay account ,I've being paying very nicely all of sudden now I've being receiving sms and call about me owing R245.00 to where we got that from I don't know I've call them for explanation even send them email no response I've paid R130 on 10th of June using my pick n pay card number no one is getting back to me like I'm so frustrated to point I wanna close these account coz their don't do follow up I even have proof of payment of R130 all I need it assistance where from here so I can close these accounts.