Terrible Service from FNB

I have send a request on Monday to FNB Home Loan to recalculate and review my interest rate on my bond and to my surprise I didn't get a response even a reply with reference number. To date I have send about 3 mails with regard to the same request, no response. Calling the FNB help desk they tell you that they haven't received my email even after sending from different emails. Previously, same request get attended to within a day or two. Going to the branch won't help because they will call the same customer care number that I called. What a terrible experince, and I am looking forward to move all my accounts from this bank.