Complain on account

Good day, can someone please contact me urgently as my account is paid up to date, i pay every month my account of R1861.76 but this month vodacom decides to take R2280.75 when i contact 082 135 they can not assist me cause they can only see i am paid up to date when i phone legal department *** the system tells me they can not help me. I have been a loyal client of vodacom for years but this last year i am not being treated fairly by vodacom. Please phone me so that this matter can be resolved.