Adt security :Unfair premiums increase due to petrol increase

I am adt security customer and I 'm not happy with the way they increase their monthly premiums. January 2022 they increase their levy with R8 due to petrol increase as per their response when I asked and now again increase with R20(March 2022) and when this really unfair as they increase their levy every second month due to petrol increase but when petrol drops they don't reduce my premiums. And when I joined Adt they didn't mention anything about increasing premiums when petrol increase. I sent email 2 weeks ago and till today no response. And this levy increase due to petrol increase started towards the end of 2019. Adt why as customer's must levy increase because of petrol increase????