Analysis of E-Service Quality and E-Trust on E-Satisfaction of PLN Mobile App Users With Digital Marketing as a Mediating Variable (Case Study at PT. PLN UP3 Pematang Siantar) - Pakpahan, Resignedly; Siregar, Nurafrina; B, Mesra (EKOMBIS REVIEW: Jurnal Ilmiah Ekonomi dan Bisnis, 2026)