INCORRECT BILLING

I hired a car on the 16th last Friday, i got the car after i got to the free i found there was a fault with it. vehicle noted that the tyre pressure is low, they i called it for them to bring a new vehicle, which they brought a vehicle of lesser group, I hired a group G vehicle they replaced it with a group Z vehicle. now the kilometers that i travelled wouldnt have been more than 100km i had the car for 5 hours, they are saying i went over by 79km from the 100 they gave me which is impossible.<br> <br> Please review and sort this out, i am being charged for a faulty vehicle and petrol for it. and yet i was also given a lesser group vehicle.<br> <br>