Cancellation's department

This company is disappointing, I have send an email with the POP Monday at 8h59am to '***', for an amount of R300.00 that they wanted from me and requested the to advise once the cancellation has been done, up until today they haven't rep**** to my email. I went as far as calling them they told me to contact them the following day, I've done that and they didn't answer their phones, I contacted them again to day , still no luck, this makes me wonder if my car get ****** what will happen.