Interest Rate

I have a home loan with ABSA which is up to date. I have tried several times to contact them regarding fixing my interest rate. I sent an email in August and i even called them. But even today i haven't even received a response from them, the only thing they gave me is a reference number. I was promised that a consultant will contact me regarding this matter. All i need is information on weather i can fix my interest, but no information has been provided. I'm even thinking of switching my bond to a different Bank.