I'm feeling tested and rejected in my faith. Was there a devotee who felt this way with Sai Baba and what happened?

Yes, a devotee named Sapatnekar experienced profound feelings of rejection and distress. Chapter 48 of the Shri Sai Satcharitra recounts how every time Sapatnekar bowed to Sai Baba, he was met with the rebuke "Chal Hat" (Go away). This caused him immense pain, making him wonder about his past sins and why he was being singled out while others experienced Baba's love. He felt his karma had peaked and became sleepless and lost his appetite. However, he resolved to stay until he received Baba's grace. His persistence was rewarded with a profound experience that revealed Baba's mysterious ways and deep, underlying connection to him, showing that such trials can precede a deeper understanding.