Non payment of account and no feedback!!

I submitted an account to Bonitas for payment from my Maternity Benefit, however I was notified that the doctor used the incorrect ICD10 code. They corrected this and I have resubmitted the invoice on 29/01/2016. <br> I then received an email stating that the claim was paid, however when I followed up with the doctor, they had not received payment. I have been trying to get this sorted out since then with no luck.<br> Each time I phone the call centre my query gets escalated.<br> Most recently I have spoken to a 'TEAM LEADER' by the name of Ella, who 'Promised' to find out what the problem is and personally phone me back by the end of that day. Since then I have left NUMEROUS messages for her but she refuses to speak to me. On 18/03/2016 she sent an email to Shamooda asking her to phone me to let me know that she is following up with IT and would provide me with feedback by 22/03/2016. Well that is today and I am still awaiting a call.... I phoned the call centre AGAIN and Ishmail said that I should wait till Thursday for feedback as Ella was not at her desk....which is always the case when I phone her.<br> This is RIDICULOUS!!<br> Is it acceptable at Bonitas to just refuse to call a customer back??