How to Fix damaged Soles on Volleyball Shoes

Hey guys. Some time ago, I bought Asics Sky Elite Ff 2, which I loved, and it was very expensive. However, I just started volleyball, so I didn't know u weren't supposed to wear them outside of the court. I wore them cause they looked sick, and after about a month and a half, I learned that wearing it outside damages the soles, and I was very very sad. I did notice that I basically had 0 grip on the court, and when I wipe it with water, I have grip for about (No exaggeration) 5 seconds, and then its gone. The grip is all gone, and I'm wondering if I can fix this or if I need to buy a new one.