Subjects - Consumer rights - Poor service
If you buy something and it goes wrong then often you will have consumer rights to complain and get a refund. In principle if what you have bought is not a thing but a service the same principle applies.
It is sometimes the case that a service being provided by a human being with all his or her human frailties may or may not be the topic of reasonable debate as to whether or not it was up to scratch, but we are the experts on this and can assist you in making your claim.