Why no email for Telkom queries?

All i need is an email address to send my account query to. I cannot find one online. Telkom is deducting a different amount from my bank account on the 15th of every month and I do not know what this is for. Telkom customer service desk says I have no billing agreement with Telkom. So if I can have a email address I can send all the details with all the dedctions and hopefully get some clarity on the matter.