Disappointing service received on my first month. I've been overcharged.

I recently joined cartrack on the 12th of August to put a tracker on my car and I would pay my monthly subscription on the 21st of every month. On the 14th of August the tracker was installed and was told by alone of their consultants that I'd be required to pay a prorated fee but they never gave me the amount. The next thing I received a call and several emails and WhatsApp messages that my debit order of R144 was not paid. The agent said this was the prorated amount plus a debit order fee of R53. I asked them why am I supposed to pay for the debit order fee whereas the consultant said he would get back to me about the pro-rata amount. They wanted to add another R53 to the R144 I said I'm not going to pay another R53. I will do an Eft of R144. Which I did on the 21st, and my first subscription was also deducted on the same day. Then yesterday morning I noticed that another debit order of R206 went off on my account. I logged a query via WhatsApp and they're giving me a run around. I want my money back ASAP. I am very disappointed with this kind of service, especially on my first month.