ICTBA harassment

I paid Bonitas directly all outstanding funds owed to them. ITCBA is still constantly harassing me saying payment hasnt been made and asking me to pay strange amounts such as R99 and R500 odd when the amount I actually paid to Bonitas was R7049. I have told multiple agents that I have proof of payment and not to contact me again but I get spammed with daily calls. You are ruining my experience of being a Bonitas member through this harassment.