Need help changing a bathroom drain plug (Bricolage, Changer une bonde)

Hi there, I’m looking for a handyman to replace a faulty bathroom drain plug. The current plug is old and doesn’t seal well, causing leaks when the shower is used. I have basic tools and will provide spare parts if you can bring the appropriate washer and replacement plug. Please help with removing the old plug, cleaning the drain area, fitting the new plug, and testing to ensure no leaks. I’d prefer someone punctual, tidy, and able to explain any maintenance tips to prevent future issues. Access to the bathroom is straightforward, and I can accommodate a morning slot on weekdays.