My cats ear is infected and my mom refuses tot ake her to the vet?!?

If your mom refuses to take you i would try and find a ride to the vet either from a friends mom or a close relative. If you cant afford the vet bill because it will prob be a couple hundred dollars i would try a home remedy such as mixing a half a cup of apple cider vinegar with a cup of water and mix the solution around. Dip a cotton ball in the mixture and wipe the inside of the cats ear but be careful not to poke the inside of the canal because you could cause damage to the ear. Apple cider vinegar has anit fungal, anti bacterial and anit viral properties. This may help. Good luck i wish for the best.