Yes, and then you have to book them, be there when they come (possibly taking time off work) and call them when they are late or don’t show. Then you find the counter top scratched and the problem reoccurs 3 days later, except when you look there is a massive goop of some crappy sealant instead of an actual part in there. Do it yourself, it’s quicker, cheaper and you don’t get as angry when it goes wrong.