24 months not 36.. I’m not a fool

Okay I took a 24 months contract on 11-01-2022. There was two options but I opted for 24 months contract since the monthly payments were still within my budget and also added an insurance. There were times when I was consulting for other things using my ID at the stores I was told on so many occasions that I’m on 24 months contract but suddenly now when it’s about to expire I’m told I took 36 months. Ffs I didn’t.. and I won’t be paying further after this December .. le nyoko ngafisha lena