Unacceptable FNB Customer Service

Taking more than 25 days to update banking details on FNB home loan, every phone call you are told that the matter is escalated to senior consultant and it will be resolved within 48 hours. 48 hours is now almost 25 days. I have made more than 6 follow up calls and feedback is that the matter is being escalated. Some of people I have spoken to is Zanele and Dinego. Each call you will hold for 15 to 20 minutes and being told, the matter is escalated. The customer service is very bad and I have closed all my Premier Account with FNB.