Poor management in Bonitas accounts department

My Doctor by mistake sent a report for my husband to Bonitas instead of Momentum medical aid. Bonitas paid for the analysis which I was unaware of. After a few month this was discovered and I paid half of the amount owing directly to Bonitas. Before Bonitas recorded the payment they sent the outstanding amount for collection to CWX agents. I paid CWX agents the balance of the amount owing and between both of these companies that do not correspond with each other. I have sent numerous e-mails confirmation of these payments to Bonitas for checking and no one has the decency to come back to me. Every month I keep on receiving a statement from Bonitas showing the balance owing. In the meantime I am continuously harassed by CWX for the amount owing which was paid directly to Bonitas. When I receive the calls from CWX I repeat the same conversation to the agent that the amount was paid to Bonitas, and if they would send me an e-mail address I will in tern send the proof of payments made. This has been going on since the end of February 2018, when the last payment was made. Phone calls are made to me on a weekly basis and to date no one has responded by sending me an e-mail address to confirm payments of the account. On the CWX website there no contact number to phone them directly. This proves that there is no training at both companies to their employees as not one of them has the knowledge to carry out a simple instruction of sending an e-mail address when request. The last caller from CWX even put the phone down when I was still speaking to him. Disgusting absolutely disgusting.