Feedback on a complaint.

My name is Busisiwe Ndlovu, last week I wrote a complaint and received a call on Friday the 22nd August with a promise that my complaint will be investigated and feedback will be provided to me.

I haven't received any feedback and would like to know, how long will the investigation take as the is a refund that I have to receive from Cartrack after they debited my account with the amount that exceeded what was on their invoice.

Can someone please provide me with feedback.