Discovery Health failure Refunded Wrong Account

I closed my Discovery health care plan in July. The remaining savings were suppose to be refunded to me after the waiting period of 3 to 4 months. I followed up with Discovery during November. I was informed they had details of a Standard Bank account which i closed 8 years ago. I submitted the change of bank details, copy of my id and bank letter on the 25/11/2015. I followed up from the 02/12/2015 and to my surprise was informed my bank account details was not updated. I have been resending my documents and calling Discovery continuously.On the 18/12/2015 I resorted to liaising with Management. Once again i had to repeat the process. On the 30/12/2015 i received a call from Discovery advising bank details have been updated to FNB however the funds have been transmitted to Standard Bank. I don't understand how Discovery can fail to action my request. Discovery agent advised me to recall the funds from Standard Bank. I visited the branch and was not successful as this account i closed has been reallocated to somebody. I have emailed request for feedback on the 13/01/2016. Funds have still not been refunded to me 14/01/2016 #Dissatisfied client.