Paid my account R 400 for cancellation via eft

My name is Mooketsa Moagi on the 08/ 09/2015 I phoned tracker asking what do I need to do if I want to cancel my contract then Tshepiso Letoaba told me that I need to R 400 which is the cancellation fee then they will cancel my contract and deactivate the unit in my car since I have sold the car. I then paid the money via eft on the 28/ 09 2015 then sent Tshepiso and email to inform her that I have paid so she responded saying the money is not yet reflecting. I sent a follow up email on the 29/09/2015, there has been no response since then now this morning I see an sms on my phone which shows that my account has been debited with R 180-00 I want Tshepiso to resolve this matter as soon as possible and take ownership of attending to customers queries as matter of agency. Also the money must refunded into my account.