Double debiting account

Cartrack have been double debiting my account and it's different amounts, I called the accounts department and the person I spoke to said she will escalate the matter, I received an email from Sihle Makhathangana requesting me to send a pop of the amount I'm disputing and I told him that's not the case and I sent him a screenshot short of the amount they have been deducting on my account and that was last week Friday and I did a follow up email and no response till to date, I'm so annoyed by the poor service and cartrack can't find out why they double debiting my account and reverse that payment back, they be asking you all these security questions to access your account but cannot trace payments history.