Question

Mr. Santos, a well-known businessman, hired Ms. Reyes, an interior designer, to renovate his newly purchased luxury condominium unit. They agreed on a contract stating that Ms. Reyes would be paid a fixed fee for her services. However, during the course of the renovation, Mr. Santos requested several additional upgrades and changes, which Ms. Reyes willingly provided.

After the renovations were completed, Mr. Santos refused to pay the additional fees for the upgrades and changes, claiming that they were included in the original contract price. Ms. Reyes, feeling unjustly deprived of the rightful compensation for her extra work, decided to take legal action.

1. Discuss the concept of unjust enrichment under the Philippine Civil Code.
2. Apply the provisions of Articles 22-23 and 2142-2143 of the Civil Code to the scenario and determine whether Ms. Reyes is entitled to additional compensation for the upgrades and changes requested by Mr. Santos.