got a call fromから marks the person who called. 電話があって is the connective form of 電話がある, meaning that there was or came a phone call; it often links to what happened next. In contexts like 電話があっても, it means “even if someone calls.”
JA: 母から電話があって、夕食を一緒に食べることになった。
EN: I got a call from my mother, and we decided to have dinner together.