Billing for services that I have no access to

I have been with Telkom since 2012 and have had minimal issues up until now. On the 18th May I ordered fibre and was under the impression that I will only be charged once I am fully active. Telkom has charged me since the 18th and my bill for June is 5 times more than it normally is as I have a current ADSL line as well. I feel that it is unfair that you are charging me for services that I do not have access to. They have given me no indication at all when the fibre will be installed in the home. Please reverse those charges as I am not paying for a service that I have no access to