ANALYSIS OF THE IMPACT OF SOCIAL MEDIA MARKETING, SERVICE QUALITY, AND SALES ACTIVITIES ON THE INCREASE IN SALES OF PROBLEMATIC FINANCING GUARANTEES (DEFAULT) THROUGH AUCTION: CASE STUDY AT ABC ISLAMIC BANK. Transekonomika 2024, 4 (6), 1135-1146. https://doi.org/10.55047/transekonomika.v4i6.768.