BILLING NOT REFLECTING ON MY ACCOUNT

On the 26th of September 2017 TELKOM made a debit on my account of an amount totalling R487 but now that amount after 14 days is not reflecting on my account and now they say i owe them R687 which is unexceptable because my account is up to date i should be only paying R199 for the current month. I tried contacting them but their stuff are so rude its like they do not want to assist. I dont know how Telkom operate because they think they can make profits my *****ing from the public. The last time one of Telkom employees by the name of Tshepo Mo***eng said he will help me but even up to now he has not returned my emails.