When receiving the plant, do not repot immediately but wait at least 6-12 months. Repot in the spring, using a 2" wider pot. (Too large of a pot could cause the soil to dry slower, which is not helpful.) Use a well-draining indoor potting mix with perlite to help with drainage or an african violet potting mix.
Water your plant in the old pot and let it sit an hour before transferring. Place a piece of screening at the bottom of the container over the drainage hole to secure the soil and allow it to drain. Add soil to the bottom to elevate the root ball. Lift the plant and release the roots against the existing planter. Use a clean knife or garden trowel to wedge between the pot and the soil to loosen. Inspect the root ball. Notice if there are any dead or rotting roots and trim off with sterile pruners. If the plant is rootbound, cut through the roots to alleviate continued encircling.
Ensure the plant is sitting about 1" below the edge of the pot to avoid water spillage. Add more soil and backfill around the sides by tamping down. Fill up to the soil line but not over. Water thoroughly, leaving the soil damp but not soggy. If settling occurs, add more soil. Enclose the new plantings in plastic bags, mist and keep them in medium light. Remove the plastic bag when the roots are established. You may observe some leaf changes as it acclimates to its new environment. It may suffer some transplant shock depending on how tight the roots were intertwined together. Trim off any declining leaves as it regains its energy and gets rooted into the soil over time.