Appalling service from Discovery

disgusting service received from discovery. I recently purchased a new vehicle and insured it with discovery. i went through the policy and noticed that the same car was duplicated on their systems. my account was then debited twice for a total amount of R3400. I then called into their call centre on the 24th of April and spoke to Nomfundo, I was told that there was a system error and that the amount would be refunded within 5-7 days and the duplicate vehicle would be removed. i waited and received no feed back nor refund from Discovery. I called in again on the 2nd of may and spoke to Bongani and i was given the same response from him. i recently called in on the 10th of May and spoke to Jane who stated that no one worked on my case and that it was just recently opened again by Nomfundo a day before and that she will call me with feedback. it is now the 13th of May and i still have not received any feedback. 19 days later and still having the same issue , the duplicate has not been removed nor have i received my refund. this is absolutely appalling service from Discovery