Worst serivice ever

I’ve phoned on Thursday to make a booking to have my bike serviced I brought it in Friday morning they said they couldn’t have it done by Saturday but definitely Monday afternoon. Monday they phoned me they said that they are not finished but I will definitely have it on Tuesday. it’s Tuesday today at 5 o’clock I phoned them they haven’t even started with my bike I just fetched my bike here and taking it to cycle lab