I have the same problem with one of does, Ginny. Hermione is her polar opposite, adores pets and people and playing but Ginny will have none of it.
Every morning at the same time I’ll give Ginny pellets so knows my presence means food and associates it with positive feelings. Then I’ll hold my hand in her cage and let her sniff me. Most of the time she flattens her ears and lunges at me but I just let her then pull back, let her sniff me again and repeat it over and over. After a couple minutes she realizes that my hand is there to stroke her and not hurt her so she’ll warm up, even hop out of the cage and sniff around me, let me cuddle her. It just takes a bit for her to warm up. She’s not angry, just scared and wary of being touched, any sudden movements scare her. We’re making very slow but sure progress and I’m sure you will too if you just have a LOT of patience and either tolerance to painful scratches or a strong glove, lol.