CAPITEC IS TRYING BY ALL MEANS TO ROB ME AND CHARGE ME MORE THAN AGREED

I was assisted and the lady told me my query was resolved and the put thing back go normal, but on my capitec app its telling me a different story. I have a 16 month loan. I started paying from the 25th November 2019. We are in September but they are saying I have 7 months remaining, this is incorrect, I should have 6 months remaining as from November 2019 to August 2020, that's 10 full months. Where is this extra month coming from ? Please explain because it's not making sense to me on my app and I refuse to pay a month extra. Our agreement was 16 months not 17 months. Go and check and come back to me please