Need hole patching in wall and patchwork repair

Hi there, I’m looking for someone to patch a small hole in a plaster wall and blend the finish so it’s not noticeable. The room is 3x4 meters with standard UK plasterboard. I’d prefer someone who can match the existing paint or bring a close color, and leave the area clean after the job. The hole is about 6-8 cm in diameter from a bumped shelf. Please provide an estimate for materials and labor, and any recommendations for how to prevent cracking in the future. Flexible on dates, but I’d like it done this week if possible.