Telkom billing department WAKE UP!!!!!!!!!

Telkom billing department is really **** they are charging me for a10 meg fiber line and 20 meg fiber line and expect me to pay for both , after I migrated from a 10MEG to 20 meg line in May 2018. I do not have a 10 meg line.... now they expect me to pay for both really ........ and no response from the billing department , mails was send to them still no reply , and to phone them are .......@@@@@ ********** Really !!!! Only response from them are the system says U need to pay this amount and then we will credit U back . Hahaha Why must I pay for a line that I do not have .This is now Month 3 that I get charged for both lines.